AS4538 — CERNET-CN CERNET
AS Name: ERX-CERNET-BKB
Description: China Education and Research Network Center Tsinghua University Beijing 100084
Registry: APNIC
⚠️ CIRCL BGP Security Rank: 0.0002% (position 13671)
aut-num: AS4538
as-name: ERX-CERNET-BKB
descr: China Education and Research Network Center
descr: Tsinghua University
descr: Beijing 100084
country: CN
remarks: This aut-num object created as part of
remarks: the ER-Transfer from ARIN
admin-c: CER-AP
tech-c: CER-AP
abuse-c: AC1685-AP
mnt-lower: MAINT-CERNET-AP
mnt-routes: MAINT-CERNET-AP
mnt-by: APNIC-HM
mnt-irt: IRT-CERNET-AP
last-modified: 2025-10-31T08:14:57Z
source: APNIC
Direct Membership
Macros that directly list AS4538 as a member:
AS20965:AS-FROM-CSTNET-TO-GEANT(4 members)
AS7497:AS-CSTNET(18 members)
AS7575:AS-RESEARCH(36 members)
AS-140570(55 members)
AS23911:AS-CUSTOMERS-V6(108 members)
AS4538:AS-CUSTOMERS(116 members)
AS1299:AS-TWELVE99-AP-V6(243 members)
AS1299:AS-TWELVE99-AP-V4(251 members)
AS-HKIX(348 members)
AS2914:AS-ASIA-V6(517 members)
AS2914:AS-ASIA(594 members)
AS20965:AS-FROM-TEIN-TO-GEANT(600 members)
AS-BBIX-T-V6(683 members)
AS-HUTCHCITY(782 members)
AS-BBIX-T(877 members)
AS-ANC-CUSTOMER-PROXY-REGISTER(2405 members)
AS58453:AS-ASIAASCUST(2512 members)
AS1239:AS-CUSTOMERS(4238 members)
AS-REACH-CUSTOMERS(8210 members)
AS-TELSTRA-INTL-CUSTOMERS(11248 members)
AS-RETN-ACTUAL-V4(12045 members)
AS-HURRICANEV6(20402 members)
Expanded Membership
All macros containing AS4538 (directly or via nested macros): 342
Show 100 macros
AS20965:AS-FROM-CSTNET-TO-GEANT(3 ASNs)
AS7497:AS-CSTNET(18 ASNs)
AS7575:AS-RESEARCH(36 ASNs)
AS-140570(55 ASNs)
AS23911:AS-CUSTOMERS-V6(108 ASNs)
AS4538:AS-CUSTOMERS(116 ASNs)
AS20965:AS-FROM-TEIN-TO-GEANT(639 ASNs)
AS-BBIX-T-V6(683 ASNs)
AS-HTHK-AS18116(781 ASNs)
AS-HUTCHCITY(781 ASNs)
AS-GIGAINFRA-V6(833 ASNs)
AS-BBIX-T(877 ASNs)
AS-GIGAINFRA(1,276 ASNs)
AS-ANC-CUSTOMER-PROXY-REGISTER(2,405 ASNs)
AS-CTGNET-CUT(2,544 ASNs)
AS-GEANTNRENPEERS(3,149 ASNs)
AS1239:AS-CUSTOMERS(4,238 ASNs)
AS-PACNET(4,289 ASNs)
AS-ANC(4,335 ASNs)
AS-REACH-CUSTOMERS(8,210 ASNs)
AS-RETN-ACTUAL-V4(12,045 ASNs)
AS-TELSTRA-INTL-CUSTOMERS(12,472 ASNs)
AS-VOXILITY-SET(15,206 ASNs)
AS58453:AS-ASIAASCUST(15,313 ASNs)
AS-RDSNET(16,878 ASNs)
AS-RDSTRANSIT(16,878 ASNs)
AS-MAGYARTELEKOM(17,357 ASNs)
AS-MATAV(17,357 ASNs)
AS58453:AS-CMI-ALL(18,020 ASNs)
AS-CMI-ALL(18,021 ASNs)
AS-COMCAST-IBONE(19,609 ASNs)
AS-NOTSURFNET-PEERS(19,650 ASNs)
AS-MZIMA-CUSTOMERS(19,702 ASNs)
AS-MZIMA(19,703 ASNs)
AS-PXGLOBAL(19,703 ASNs)
AS-SEABONECUSTAS(19,767 ASNs)
AS-ARBINET-LAX-BUYERS(19,875 ASNs)
AS-HURRICANEV6(20,402 ASNs)
AS-SEECIX-V6(20,691 ASNs)
AS56858:AS-SEECIX-V6(20,691 ASNs)
AS-DECIX-RIC-V6(20,721 ASNs)
AS393752:AS-DECIX-RIC-V6(20,721 ASNs)
AS30781:AS-JAGUAR-PEERING-V6-TIX(21,568 ASNs)
AS-LITIX-V6(22,027 ASNs)
AS-T-CIX-V6(22,807 ASNs)
AS-XO(23,361 ASNs)
AS-VSNL-IN(23,661 ASNs)
AS-BALT-IX-V6(23,949 ASNs)
AS30781:AS-JAGUAR-PEERING-V6-CIXP(24,509 ASNs)
AS-FLAGP(25,034 ASNs)
AS-FLAGT(25,034 ASNs)
AS-FIXO-V6(25,776 ASNs)
AS-MFNX(26,187 ASNs)
AS47214:AS-LILLIX(26,738 ASNs)
AS43100:AS-MEMBERS(26,826 ASNs)
AS-SFINX-RS-MEMBERS-IPV6(26,914 ASNs)
AS-SFINX-RS-MEMBERS(26,976 ASNs)
AS-DECIX-BCN-V6(28,476 ASNs)
AS57802:AS-DECIX-BCN-V6(28,476 ASNs)
AS30781:AS-JAGUAR-PEERING-V6-SWISS-IX(28,564 ASNs)
AS-DECIX-ORD-V6(31,479 ASNs)
AS62760:AS-DECIX-ORD-V6(31,479 ASNs)
AS-DECIX-LIS-V6(32,541 ASNs)
AS43729:AS-DECIX-LIS-V6(32,541 ASNs)
AS30781:AS-JAGUAR-PEERING-V6-EQUINIX-PA(34,681 ASNs)
AS-T-CIX(36,150 ASNs)
AS-MONIX-PEERS(37,180 ASNs)
AS-TAHOEIX-MEMBERS(37,370 ASNs)
AS-MBIX-RS-MEMBERS(37,425 ASNs)
AS-ONIX(37,766 ASNs)
AS211776:AS-CRAFTBYTE-UPSTREAMS(37,882 ASNs)
AS-VSIX-RS(38,411 ASNs)
AS207800:AS-RTIX-SET(39,194 ASNs)
AS33495:AS-MEMBERS(39,231 ASNs)
AS-DECIX-DFW-V6(40,077 ASNs)
AS62499:AS-DECIX-DFW-V6(40,077 ASNs)
AS-LUCIX-RS(40,498 ASNs)
AS7606:AS-QLD-IX(40,666 ASNs)
AS7606:AS-WA-IX(40,872 ASNs)
AS-STUIX(41,458 ASNs)
AS-SONIX(41,963 ASNs)
AS-VANIX-RS-PARTICIPANTS(42,555 ASNs)
AS201376:AS-PEERS(42,984 ASNs)
AS-INTEROUTE(43,471 ASNs)
AS30781:AS-JAGUAR-PEERING-V6-FRANCE-IX-MARSEILLE(44,422 ASNs)
AS-ECIX-BER(45,114 ASNs)
AS-ECIX-HAM(46,249 ASNs)
AS-INTELSATUS(46,298 ASNs)
AS7606:AS-NSW-IX(46,591 ASNs)
AS7606:AS-ALL(47,090 ASNs)
AS-RETN(47,667 ASNs)
AS-ECIX-MUC(48,469 ASNs)
AS-ECIX-DUS(48,854 ASNs)
AS2914:AS-US-V6(52,836 ASNs)
AS2914:AS-US(53,991 ASNs)
AS-NIXSK-RSCLIENTS(55,989 ASNs)
AS47627:AS-NIXSK-RSCLIENTS(56,033 ASNs)
AS-BIX-V6(56,058 ASNs)
AS-TELIANETRU(56,840 ASNs)
AS1299:AS-TWELVE99-RU-V4(56,840 ASNs)
... and 242 more
Upstream AS Paths
323 unique paths, avg length 2.5
AS Looking Glass
Upstream paths (matching graph above)
All 323 Upstream Paths
Complete list of all observed paths
AS4538 IPv4 Address Subnets (5141)
| 202.192.0.0/12 | 🇨🇳 CN | PACNET (proxy-registered route object) | ERX-CERNET-BKB |
| 210.32.0.0/12 | 🇨🇳 CN | PACNET (proxy-registered route object) | ERX-CERNET-BKB |
| 222.16.0.0/12 | 🇨🇳 CN | PACNET (proxy-registered route object) | ERX-CERNET-BKB |
| 222.192.0.0/12 | 🇨🇳 CN | PACNET (proxy-registered route object) | ERX-CERNET-BKB |
| 58.192.0.0/12 | 🇨🇳 CN | PACNET (proxy-registered route object) | ERX-CERNET-BKB |
| 59.64.0.0/12 | 🇨🇳 CN | PACNET (proxy-registered route object) | ERX-CERNET-BKB |
| 125.216.0.0/13 | 🇨🇳 CN | PACNET (proxy-registered route object) | ERX-CERNET-BKB |
| 202.112.0.0/13 | 🇨🇳 CN | CERNET | ERX-CERNET-BKB |
| 202.192.0.0/13 | 🇨🇳 CN | CERNET | ERX-CERNET-BKB |
| 202.200.0.0/13 | 🇨🇳 CN | ERX-CERNET-BKB |
AS4538 IPv6 Address Subnets (5014)
| 2001:250:101f::/48 | 🇨🇳 CN | ERX-CERNET-BKB | |
| 2001:250:2::/48 | 🇨🇳 CN | ERX-CERNET-BKB | |
| 2001:250:205::/48 | 🇨🇳 CN | ERX-CERNET-BKB | |
| 2001:250:206::/48 | 🇨🇳 CN | ERX-CERNET-BKB | |
| 2001:250:207::/48 | 🇨🇳 CN | ERX-CERNET-BKB | |
| 2001:250:208::/48 | 🇨🇳 CN | ERX-CERNET-BKB | |
| 2001:250:209::/48 | 🇨🇳 CN | ERX-CERNET-BKB | |
| 2001:250:20a::/48 | 🇨🇳 CN | ERX-CERNET-BKB | |
| 2001:250:20b::/48 | 🇨🇳 CN | ERX-CERNET-BKB | |
| 2001:250:20c::/48 | 🇨🇳 CN | ERX-CERNET-BKB |