AS Name
CERN
Org Name
CERN - European Organization for Nuclear Research
Registry Region
Switzerland
Looking Glass
IPv4Prefixes

25

IPv6Prefixes

2

IPv4 NUMs

354,816

IPv6 NUMs(/64)

8,589,934,592

354,816 IPv4 Addresses
CIDR Description IP Num
128.141.0.0/24 CERN - European Organization for Nuclear Research 256
128.141.0.0/16 CERN - European Organization for Nuclear Research 65536
128.142.0.0/24 CERN - European Organization for Nuclear Research 256
128.142.0.0/16 CERN - European Organization for Nuclear Research 65536
137.138.0.0/24 CERN - European Organization for Nuclear Research 256
137.138.0.0/16 CERN - European Organization for Nuclear Research 65536
185.249.56.0/22 datacentre-fabric-01 1024
188.184.0.0/24 CERN - European Organization for Nuclear Research 256
188.184.0.0/16 CERN - European Organization for Nuclear Research 65536
188.185.0.0/24 CERN - European Organization for Nuclear Research 256
188.185.0.0/16 CERN - European Organization for Nuclear Research 65536
192.16.155.0/24 CERN - European Organization for Nuclear Research 256
192.16.156.0/22 CERN - European Organization for Nuclear Research 1024
192.16.160.0/22 CERN - European Organization for Nuclear Research 1024
192.16.164.0/23 CERN - European Organization for Nuclear Research 512
192.16.166.0/24 CERN - European Organization for Nuclear Research 256
192.65.183.0/24 CERN - European Organization for Nuclear Research 256
192.65.184.0/21 CERN - European Organization for Nuclear Research 2048
192.65.192.0/22 CERN - European Organization for Nuclear Research 1024
192.65.196.0/23 CERN - European Organization for Nuclear Research 512
192.91.236.0/22 CERN - European Organization for Nuclear Research 1024
192.91.240.0/22 CERN - European Organization for Nuclear Research 1024
192.91.244.0/23 CERN - European Organization for Nuclear Research 512
192.91.246.0/24 CERN - European Organization for Nuclear Research 256
194.12.128.0/18 CERN - European Organization for Nuclear Research 16384
CIDR Description IP NUMs(prefix /64)
2001:1458::/32 CERN - European Organization for Nuclear Research 4294967296
2001:1459::/32 CERN - European Organization for Nuclear Research 4294967296
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS49434 HARMONYHOSTING-AS - Harmony Hosting SARL, FR France 2,304 38,654,705,664 IPv6 IPv6
AS559 SWITCH, CH Switzerland 2,253,312 180,388,888,576 IPv4 IPv4 IPv6 IPv6
AS1103 SURFNET-NL - SURFnet bv, NL Netherlands 6,227,968 281,509,336,514,560 IPv4 IPv4 IPv6 IPv6
AS3303 SWISSCOM - Swisscom (Schweiz) AG, CH Switzerland 3,608,576 161,330,364,416 IPv4 IPv4
AS6762 SEABONE-NET - TELECOM ITALIA SPARKLE S.p.A., IT Italy 128,768 8,590,065,664 IPv4 IPv4 IPv6 IPv6
AS15576 NTS - NTS workspace AG, CH Switzerland 46,080 124,587,999,232 IPv4 IPv4 IPv6 IPv6
AS20932 SIG-ST - Services Industriels de Geneve, CH Switzerland 9,472 4,295,032,832 IPv4 IPv4
AS10764 STARTAP - National Center for Supercomputing Applications, US United States 512 0 IPv4 IPv4
AS25091 IP-MAX - IP-Max SA, CH Switzerland 13,568 34,359,738,368 IPv4 IPv4 IPv6 IPv6
AS29222 Infomaniak-AS - Infomaniak Network SA, CH Switzerland 33,024 17,179,869,184 IPv4 IPv4
AS5511 Opentransit - Orange S.A., FR France 784,384 4,299,161,600 IPv4 IPv4 IPv6 IPv6
AS6830 LGI-UPC - Liberty Global B.V., AT Austria 12,215,296 1,009,619,763,200 IPv4 IPv4 IPv6 IPv6
AS12350 VTX-NETWORK - VTX Services SA, CH Switzerland 414,464 8,590,000,128 IPv4 IPv4
AS20965 GEANT - GEANT Vereniging, GB United Kingdom 9,216 8,589,934,592 IPv4 IPv4 IPv6 IPv6
AS11537 INTERNET2-RESEARCH-EDU - Internet2, US United States 9,472 4,294,967,296 IPv6 IPv6
AS57199 MilkyWan, FR France 1,280 12,884,901,888 IPv6 IPv6
AS174 COGENT-174 - Cogent Communications, US United States 27,576,832 310,095,085,568 IPv4 IPv4
AS293 ESNET, US United States 395,008 4,295,032,832 IPv4 IPv4 IPv6 IPv6
AS6939 HURRICANE - Hurricane Electric LLC, US United States 518,656 286,144,143,556,608 IPv4 IPv4
AS13030 INIT7 - Init7 (Switzerland) Ltd., CH Switzerland 95,744 77,330,841,600 IPv4 IPv4 IPv6 IPv6
AS15547 NETPLUS - netplus.ch SA, CH Switzerland 128,256 38,654,705,664 IPv4 IPv4 IPv6 IPv6
AS21320 GEANT_IAS_VRF - GEANT Vereniging, GB United Kingdom 2,048 4,295,032,832 IPv4 IPv4 IPv6 IPv6
AS Description Country/Region IPv4 NUMs IPv6 NUMs IPv4 IPv6
AS11537 INTERNET2-RESEARCH-EDU - Internet2, US United States 9,472 4,294,967,296 IPv4 IPv4
AS33845 SWISSGOV - Swiss Federation represented by FOITT, CH Switzerland 135,168 4,294,967,296 IPv4 IPv4
AS43100 Lyonix - Rezopole A.D., FR France 0 0 IPv4 IPv4
AS2907 JPNIC-2Byte-ASBLOCK-AP - for assignment to JPNIC members, JP Japan 8,957,760 8,589,934,592 IPv4 IPv4
AS6830 LGI-UPC - Liberty Global B.V., AT Austria 12,215,296 1,009,619,763,200 IPv4 IPv4
AS29424 bsa - Briod SA, CH Switzerland 9,216 34,359,738,368 IPv4 IPv4
AS6509 CANARIE-NTN - Canarie Inc, CA Canada 512 65,536 IPv4 IPv4
AS15547 NETPLUS - netplus.ch SA, CH Switzerland 128,256 38,654,705,664 IPv4 IPv4
AS297 AS297 - National Aeronautics and Space Administration, US United States 933,120 4,294,967,296 IPv4 IPv4
AS2697 ERX-ERNET-AS - ERNET India, IN India 38,656 33,685,504 IPv4 IPv4
AS13030 INIT7 - Init7 (Switzerland) Ltd., CH Switzerland 95,744 77,330,841,600 IPv4 IPv4
AS22335 MREN - Metropolitan Research and Education Network, US United States 256 0 IPv4 IPv4
AS28810 WHO-AS - World Health Organization (WHO), CH Switzerland 65,792 0 IPv4 IPv4
AS30781 JAGUAR-AS - Jaguar Network SAS, FR France 78,080 133,145,100,288 IPv4 IPv4
AS1103 SURFNET-NL - SURFnet bv, NL Netherlands 6,227,968 281,509,336,514,560 IPv4 IPv4
AS15576 NTS - NTS workspace AG, CH Switzerland 46,080 124,587,999,232 IPv4 IPv4
AS43142 AdeliNovius - ADELI SAS, FR France 7,168 38,654,705,664 IPv4 IPv4
AS59624 KIAE-COMPUTING-AS - Federal State Institution Russian Scientific Center Kurchatovsky institute, RU Russian Federation 8,704 65,536 IPv4 IPv4
AS2018 TENET-1 - TENET (The UNINET Project), ZA South Africa 1,308,160 4,296,015,872 IPv4 IPv4
AS12333 DFINET - DFI Service SA, CH Switzerland 10,752 4,294,967,296 IPv4 IPv4
AS43115 PIC - Consorci Institut de Fisica Altes Energies, ES Spain 1,024 65,536 IPv4 IPv4
AS20634 TELECOM-LI - Telecom Liechtenstein AG, LI Liechtenstein 24,832 73,014,444,032 IPv4 IPv4
AS3303 SWISSCOM - Swisscom (Schweiz) AG, CH Switzerland 3,608,576 161,330,364,416 IPv4 IPv4
AS6853 ORANGE-BUSINESS-SERVICES-SOUTHEUR - ORANGE BUSINESS SERVICES U.S. Inc., FR France 0 0 IPv4 IPv4
AS13238 YANDEX - YANDEX LLC, RU Russian Federation 198,912 34,360,786,944 IPv4 IPv4
AS15169 GOOGLE - Google LLC, US United States 9,477,120 98,801,090,560 IPv4 IPv4
AS20932 SIG-ST - Services Industriels de Geneve, CH Switzerland 9,472 4,295,032,832 IPv4 IPv4
AS48751 UNOG-AS - United Nations Logistics Base, CH Switzerland 512 0 IPv4 IPv4
AS6762 SEABONE-NET - TELECOM ITALIA SPARKLE S.p.A., IT Italy 128,768 8,590,065,664 IPv4 IPv4
AS9885 NKN-INTERNET-GW - National Knowledge Network, IN India 1,024 0 IPv4 IPv4
AS20965 GEANT - GEANT Vereniging, GB United Kingdom 9,216 8,589,934,592 IPv4 IPv4
AS21320 GEANT_IAS_VRF - GEANT Vereniging, GB United Kingdom 2,048 4,295,032,832 IPv4 IPv4
AS21449 ETATGE - ETAT DE GENEVE, CH Switzerland 135,424 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS24167 ASGCNet - Academia Sinica Grid Computing Center, TW Taiwan 13,568 4,294,967,296 IPv4 IPv4
AS29222 Infomaniak-AS - Infomaniak Network SA, CH Switzerland 33,024 17,179,869,184 IPv4 IPv4
AS12654 RIPE-NCC-RIS-AS - Reseaux IP Europeens Network Coordination Centre (RIPE NCC), NL Netherlands 11,040 2,949,120 IPv4 IPv4 IPv6 IPv6
AS25152 K-ROOT-SERVER - Reseaux IP Europeens Network Coordination Centre (RIPE NCC), NL Netherlands 512 4,294,967,296 IPv4 IPv4 IPv6 IPv6
AS32361 ULTRALIGHT, US United States 1,024 65,536 IPv4 IPv4
AS12350 VTX-NETWORK - VTX Services SA, CH Switzerland 414,464 8,590,000,128 IPv4 IPv4
AS174 COGENT-174 - Cogent Communications, US United States 27,576,832 310,095,085,568 IPv4 IPv4
AS559 SWITCH, CH Switzerland 2,253,312 180,388,888,576 IPv4 IPv4
AS3320 DTAG - Deutsche Telekom AG, DE Germany 34,096,128 35,373,374,177,280 IPv4 IPv4
AS6776 THENET - TheNet - Internet Services AG, CH Switzerland 6,912 4,294,967,296 IPv4 IPv4
AS43683 MLITE-AS - GRUND BETEILIGUNGEN AG, FR France 3,584 0 IPv4 IPv4
AS24904 KWAOO - K-NET SARL, FR France 37,632 4,294,967,296 IPv4 IPv4
AS293 ESNET, US United States 395,008 4,295,032,832 IPv4 IPv4
AS2200 FR-RENATER - Renater, FR France 2,387,200 4,294,967,296 IPv4 IPv4
AS2603 NORDUNET, NO Norway 9,984 4,294,967,296 IPv4 IPv4
AS5511 Opentransit - Orange S.A., FR France 784,384 4,299,161,600 IPv4 IPv4
AS6939 HURRICANE - Hurricane Electric LLC, US United States 518,656 286,144,143,556,608 IPv4 IPv4
AS10764 STARTAP - National Center for Supercomputing Applications, US United States 512 0 IPv4 IPv4
AS17579 KREONET2-AS-KR - KISTI, KR Republic of Korea 3,592 0 IPv4 IPv4
AS6730 SUNRISE - Sunrise Communications AG, CH Switzerland 876,800 137,439,150,080 IPv4 IPv4
AS15830 Equinix-Connect-EMEA - TELECITYGROUP INTERNATIONAL LIMITED, GB United Kingdom 407,040 64,609,845,248 IPv4 IPv4
AS25091 IP-MAX - IP-Max SA, CH Switzerland 13,568 34,359,738,368 IPv4 IPv4

Peers at this Exchange Point

Country/Region IX IPv4 IPv6 Port Speed Updated
Switzerland CIXP - CERN Internet eXchange Point 192.65.185.3 2001:7f8:1c:24a::201:1 10 Gbps 2016-03-14 21:45:49

Private Peering Facilities

Country/Region Name City Website Updated
as-block:       AS513 - AS513
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2018-11-22T15:27:06Z
last-modified:  2018-11-22T15:27:06Z
source:         RIPE



aut-num:        AS513
as-name:        CERN
remarks:
import:         from AS174 accept ANY
import:         from AS293 accept ANY
import:         from AS297 accept ANY
import:         from AS559 accept ANY
import:         from AS1103 accept AS1103
import:         from AS1297 accept ANY
import:         from AS2200 accept ANY
import:         from AS2603 accept ANY
import:         from AS2697 accept AS2697
import:         from AS3303 accept AS-SWCMGLOBAL
import:         from AS6509 accept ANY
import:         from AS6730 accept ANY
import:         from AS6830 accept AS-AORTA
import:         from AS6830 accept ANY
import:         from AS6853 accept AS-EQUANT-SOUTHEUR
import:         from AS6939 accept AS6939
import:         from AS8674 accept AS-NETNOD-ANYCAST
import:         from AS9885 accept AS9885
import:         from AS10764 accept ANY
import:         from AS11344 accept AS11344
import:         from AS11537 accept ANY
import:         from AS12333 accept AS-DFI
import:         from AS12350 accept AS-VTX
import:         from AS12654 accept AS12654
import:         from AS13030 accept AS13030
import:         from AS13238 accept AS13238
import:         from AS15169 accept AS-GOOGLE
import:         from AS15547 accept AS15547
import:         from AS17579 accept AS17579
import:         from AS20932 accept AS-IP-MAN
import:         from AS20965 accept ANY
import:         from AS21320 accept ANY
import:         from AS21357 accept not any
import:         from AS22335 accept ANY
import:         from AS24167 accept AS24167
import:         from AS24904 accept AS24904
import:         from AS25091 accept ANY
import:         from AS25152 accept AS25152
import:         from AS28810 accept AS28810
import:         from AS29222 accept AS29222:AS-INFOMANIAK
import:         from AS30781 accept AS-JAGUAR
import:         from AS32361 accept AS32361
import:         from AS33845 accept AS-SWISSGOV
import:         from AS43115 accept AS43115
import:         from AS43142 accept AS-ADELINOVIUS
import:         from AS43683 accept AS-IHA
import:         from AS48751 accept AS48751
import:         from AS57859 accept ANY
import:         from AS59624 accept AS59624
remarks:
export:         to AS174 announce AS-CERNEXT
export:         to AS293 announce AS-CERNEXT
export:         to AS297 announce AS-CERNEXT
export:         to AS559 announce AS-CERNEXT
export:         to AS1103 announce AS-CERNEXT
export:         to AS1297 announce AS-CERNEXT
export:         to AS2200 announce AS-CERNEXT
export:         to AS2603 announce AS-CERNEXT
export:         to AS2697 announce AS-CERNEXT
export:         to AS3303 announce AS-CERNEXT
export:         to AS6509 announce AS-CERNEXT
export:         to AS6730 announce AS-CERNEXT
export:         to AS6830 announce AS-CERNEXT
export:         to AS6853 announce AS-CERNEXT
export:         to AS6939 announce AS-CERNEXT
export:         to AS8674 announce AS-CERNEXT
export:         to AS9885 announce AS-CERNEXT
export:         to AS10764 announce AS-CERNEXT
export:         to AS11344 announce community(513:11344)
export:         to AS11537 announce AS-CERNEXT
export:         to AS12333 announce AS-CERNEXT
export:         to AS12350 announce AS-CERNEXT
export:         to AS12654 announce ANY
export:         to AS13030 announce AS-CERNEXT
export:         to AS13238 announce AS-CERNEXT
export:         to AS15169 announce AS-CERNEXT
export:         to AS15547 announce AS-CERNEXT
export:         to AS17579 announce AS-CERNEXT
export:         to AS20932 announce AS-CERNEXT
export:         to AS20965 announce AS-CERNEXT
export:         to AS21320 announce AS-CERNEXT
export:         to AS21357 announce community(513:21357)
export:         to AS22335 announce AS-CERNEXT
export:         to AS24167 announce AS-CERNEXT
export:         to AS24904 announce AS-CERNEXT
export:         to AS25091 announce AS-CERNEXT
export:         to AS25152 announce {0.0.0.0/0}
export:         to AS28810 announce {0.0.0.0/0}
export:         to AS29222 announce AS-CERNEXT
export:         to AS30781 announce AS-CERNEXT
export:         to AS32361 announce AS-CERNEXT
export:         to AS33845 announce AS-CERNEXT
export:         to AS43115 announce AS-CERNEXT
export:         to AS43142 announce AS-CERNEXT
export:         to AS43683 announce AS-CERNEXT
export:         to AS48751 announce ANY
export:         to AS59624 announce AS-CERNEXT
remarks:
mp-import:      afi ipv6.unicast from AS174 accept ANY
mp-import:      afi ipv6.unicast from AS293 accept ANY
mp-import:      afi ipv6.unicast from AS297 accept ANY
mp-import:      afi ipv6.unicast from AS559 accept ANY
mp-import:      afi ipv6.unicast from AS1103 accept ANY
mp-import:      afi ipv6.unicast from AS2200 accept ANY
mp-import:      afi ipv6.unicast from AS2603 accept ANY
mp-import:      afi ipv6.unicast from AS6509 accept ANY
mp-import:      afi ipv6.unicast from AS6730 accept ANY
mp-import:      afi ipv6.unicast from AS6830 accept ANY
mp-import:      afi ipv6.unicast from AS6853 accept AS-EQUANT-SOUTHEUR
mp-import:      afi ipv6.unicast from AS6939 accept AS6939
mp-import:      afi ipv6.unicast from AS8674 accept AS-NETNOD-ANYCAST
mp-import:      afi ipv6.unicast from AS9885 accept ANY
mp-import:      afi ipv6.unicast from AS11344 accept AS11344
mp-import:      afi ipv6.unicast from AS12654 accept AS12654
mp-import:      afi ipv6.unicast from AS13030 accept AS13030
mp-import:      afi ipv6.unicast from AS13238 accept AS13238
mp-import:      afi ipv6.unicast from AS15169 accept AS-GOOGLE
mp-import:      afi ipv6.unicast from AS15547 accept AS15547
mp-import:      afi ipv6.unicast from AS17579 accept AS17579
mp-import:      afi ipv6.unicast from AS20932 accept AS-IP-MAN
mp-import:      afi ipv6.unicast from AS20965 accept ANY
mp-import:      afi ipv6.unicast from AS21320 accept ANY
mp-import:      afi ipv6.unicast from AS24167 accept AS24167
mp-import:      afi ipv6.unicast from AS24904 accept AS24904
mp-import:      afi ipv6.unicast from AS25091 accept ANY
mp-import:      afi ipv6.unicast from AS25152 accept AS25152
mp-import:      afi ipv6.unicast from AS30781 accept AS-JAGUAR
mp-import:      afi ipv6.unicast from AS43115 accept ANY
mp-import:      afi ipv6.unicast from AS57859 accept ANY
mp-import:      afi ipv6.unicast from AS59624 accept AS59624
remarks:
mp-export:      afi ipv6.unicast to AS174 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS293 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS297 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS559 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS1103 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS2200 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS2603 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS6509 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS6730 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS6830 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS6853 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS6939 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS8674 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS9885 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS11344 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS12654 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS13030 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS13238 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS15169 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS15547 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS17579 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS20932 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS20965 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS21320 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS24167 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS24904 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS25091 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS25152 announce {::0/0}
mp-export:      afi ipv6.unicast to AS30781 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS43115 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS57859 announce AS-CERNEXT
mp-export:      afi ipv6.unicast to AS59624 announce AS-CERNEXT
remarks:        ----------------------------------------------------- Community Definition ----------------------------------------------------- 513:21357 Prefix to be announced to Akamai 513:11344 Prefix to be announced to GCC -----------------------------------------------------
remarks:
admin-c:        CERN513
tech-c:         CERN513
status:         LEGACY
mnt-by:         RIPE-NCC-LEGACY-MNT
org:            ORG-CEOf1-RIPE
mnt-by:         CERN-MNT
created:        2001-10-22T15:20:40Z
last-modified:  2019-11-27T14:28:59Z
source:         RIPE # Filtered

organisation:   ORG-CEOf1-RIPE
org-name:       CERN - European Organization for Nuclear Research
org-type:       LIR
address:        CERN
address:        CH-1211
address:        Geneva 23
address:        SWITZERLAND
phone:          +41 22 76 74417
fax-no:         +41 22 76 77155
admin-c:        EM1969
admin-c:        DGR6-RIPE
tech-c:         CERN513
abuse-c:        CERN513
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        CERN-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         CERN-MNT
created:        2004-04-17T11:02:00Z
last-modified:  2016-06-22T07:43:07Z
source:         RIPE # Filtered

role:           CERN NOC
address:        CERN - European Organization for Nuclear Research
address:        Network Operation Center
address:        IT Department - CS group
address:        CH-1211 Geneva 23 - Switzerland
phone:          +41227675011
fax-no:         +41227677155
remarks:        trouble: ------------------------------------------
remarks:        trouble:      Operational issues: <[email protected]>
remarks:        trouble:      Peering issues: <[email protected]>
remarks:        trouble:      CIXP issues: <[email protected]>
remarks:        trouble:      Abuse and SPAM: <[email protected]>
remarks:        trouble: ------------------------------------------
admin-c:        EM1969
admin-c:        JS16747-RIPE
tech-c:         EM1969
tech-c:         DGR6-RIPE
nic-hdl:        CERN513
mnt-by:         CERN-MNT
abuse-mailbox:  [email protected]
created:        2015-04-14T08:36:32Z
last-modified:  2016-06-22T07:07:39Z
source:         RIPE # Filtered