AS2501
AS Name: U-TOKYO
Description: The University of Tokyo Autonomous System
Registry: RADB
aut-num: AS2501
as-name: U-TOKYO
descr: The University of Tokyo Autonomous System
admin-c: NM010JP
tech-c: AK27-AP
import: from AS2500 action pref=100; accept ANY
import: from AS2907 action pref=100; accept ANY
import: from AS7531 action pref=100; accept AS7531
export: to AS2500 announce AS2501AS7531
export: to AS2907 announce AS2501AS7531
export: to AS7531 announce ANY
notify: nocstaff@nc.u-tokyo.ac.jp
mnt-by: MAINT-AS2500
changed: kato@wide.ad.jp 20020905
source: RADB
last-modified: 2023-11-13T15:39:33Z
Upstream AS Paths
27 unique paths, avg length 2.9
AS Looking Glass
Upstream paths (matching graph above)
Prefixes (6) →
View all IPv4 and IPv6 prefixes originated by AS2501
Hostnames in AS2501
Direct Membership
Macros that directly list AS2501 as a member:
AS-APANJP(3 members)
AS-2500-2914(33 members)
AS-WIDE(52 members)
AS2907:AS-SINET(150 members)
AS20965:AS-FROM-TEIN-TO-GEANT(600 members)
AS-BBIX-T-V6(683 members)
AS-BBIX-T(877 members)
AS-IIJ6(898 members)
AS-IIJ(1639 members)
AS1239:AS-CUSTOMERS(4238 members)
Expanded Membership
All macros containing AS2501 (directly or via nested macros): 96
Show 96 macros
AS-APANJP(3 ASNs)
AS-2500-2914(33 ASNs)
AS-WIDE(52 ASNs)
AS2907:AS-SINET(150 ASNs)
AS20965:AS-FROM-TEIN-TO-GEANT(639 ASNs)
AS-BBIX-T-V6(683 ASNs)
AS-GIGAINFRA-V6(833 ASNs)
AS-BBIX-T(877 ASNs)
AS-GIGAINFRA(1,276 ASNs)
AS20965:AS-FROM-INTERNET2-TO-GEANT(2,433 ASNs)
AS-IIJ6(2,528 ASNs)
AS-GEANTNRENPEERS(3,149 ASNs)
AS-IIJ(3,162 ASNs)
AS1239:AS-CUSTOMERS(4,238 ASNs)
AS-PACNET(4,289 ASNs)
AS-ANC(4,335 ASNs)
AS-SEABONECUSTAS(19,767 ASNs)
AS-XO(23,361 ASNs)
AS2914:AS-US-V6(52,836 ASNs)
AS2914:AS-US(53,991 ASNs)
AS-HKIX(64,663 ASNs)
AS-TELIANETASIA(65,174 ASNs)
AS1299:AS-TWELVE99-AP-V4(65,174 ASNs)
AS-TELIANETASIA-V6(66,784 ASNs)
AS1299:AS-TWELVE99-AP-V6(66,784 ASNs)
AS2914:AS-ASIA-V6(68,905 ASNs)
AS17645:AS-NTTS(70,764 ASNs)
AS2914:AS-ASIA(70,764 ASNs)
AS17645:AS-NTTS-IP(70,764 ASNs)
AS-SEABONE(71,409 ASNs)
AS-DECIX-PMO-V6(72,294 ASNs)
AS25083:AS-DECIX-PMO-V6(72,294 ASNs)
AS-DECIX-PMO(72,297 ASNs)
AS25083:AS-DECIX-PMO(72,297 ASNs)
AS2914:AS-EUROPE-V6(73,647 ASNs)
AS-EBONE(73,672 ASNs)
AS-ST1-UPSTREAMS(73,733 ASNs)
AS-DECIX-IST(73,942 ASNs)
AS20715:AS-DECIX-IST(73,942 ASNs)
AS-VERIO-EUROPE(74,186 ASNs)
AS2914:AS-EUROPE(74,186 ASNs)
AS-OPENPEERINGPEERS(76,528 ASNs)
AS-OPENPEERINGPEERS-EU(76,536 ASNs)
AS-IX(76,712 ASNs)
AS-SPEED-IX(76,712 ASNs)
AS30781:AS-JAGUAR-PEERING-LINX(77,905 ASNs)
AS-1-IX(79,814 ASNs)
AS31561:AS-MEMBERS-AMS(79,814 ASNs)
AS31561:AS-MEMBERS(79,895 ASNs)
AS-STOLON-PEERING(79,897 ASNs)
AS2914:AS-GLOBAL-V6(81,831 ASNs)
AS30781:AS-JAGUAR-PEERING-V6-LINX(81,936 ASNs)
AS-DATAIX(82,325 ASNs)
AS-DATAIX-UA(82,325 ASNs)
AS-VERIO(82,495 ASNs)
AS-WNA(82,495 ASNs)
AS2914:AS-GLOBAL(82,495 ASNs)
AS-10VPN-PEERS(82,586 ASNs)
AS-1-IX-WAW(82,799 ASNs)
AS3326:AS-UA(83,796 ASNs)
AS3326:AS-PEERS-UA(83,796 ASNs)
AS-1-IX-WAW-V6(84,590 ASNs)
AS-SEATTLEIX-RS-CLIENTS(84,639 ASNs)
AS-NL-IX-RS(85,102 ASNs)
AS-KLNK-IX(85,102 ASNs)
AS-TELIANETEU-V6(85,444 ASNs)
AS1299:AS-TWELVE99-EU-V6(85,444 ASNs)
AS-TELIANETEU(85,632 ASNs)
AS1299:AS-TWELVE99-EU-V4(85,632 ASNs)
AS-TELIANETNA(86,938 ASNs)
AS1299:AS-TWELVE99-NA-V4(86,938 ASNs)
AS-TELIANETNA-V6(86,952 ASNs)
AS1299:AS-TWELVE99-NA-V6(86,952 ASNs)
AS-1-IX-V6(87,628 ASNs)
AS-SOX(90,571 ASNs)
AS59900:AS-B-IX-PARTNERS(90,888 ASNs)
AS-VIX-RS(90,892 ASNs)
AS-VIX-RS-V6(91,142 ASNs)
AS216369:AS-IX(91,206 ASNs)
AS-TELIANET-V6(92,705 ASNs)
AS1299:AS-TWELVE99-V6(92,705 ASNs)
AS-TELIANET(92,989 ASNs)
AS1299:AS-TWELVE99-V4(92,989 ASNs)
AS-BCIX(93,003 ASNs)
AS16374:AS-BCIX-ALL(93,003 ASNs)
AS1299:AS-TWELVE99(93,076 ASNs)
AS-TIXZH(94,757 ASNs)
AS-DECIX(96,509 ASNs)
AS-NFON-DECIX-PEERS-V4(96,509 ASNs)
AS-NFON-DECIX-PEERS-V6(96,509 ASNs)
AS6695:AS-DECIX-FRA(96,509 ASNs)
AS-ST1-IXPS(96,670 ASNs)
AS-DECIX-V6(100,277 ASNs)
AS6695:AS-DECIX-FRA-V6(100,277 ASNs)
AS-CLOUD-IX-PRO(100,911 ASNs)
AS-MERKEL-PEERS(100,925 ASNs)