AS4538 · 
CN — ERX-CERNET-BKB China Education and Research Network Center
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ERX-CERNET-BKB China Education and Research Network Center · · CN
Identity source
AS4538 · CN ERX-CERNET-BKB China Education and Research Network CenterNRO allocation data
Selected local snapshot coverage; not the whole Internet. BGP snapshots: ris-rrc00 11 Oct 00:00 UTC; routeviews2 11 Oct 02:00 UTC; routeviews6 11 Oct 02:00 UTC. Validator: 11 Oct 01:59 UTC. Publication-point issues: 89
Address space details
Overlapping originated prefixes counted once. IPv4 addresses: 17,173,248
IPv6 addresses: 4141292660894414856985952387072
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Observed originated prefixes
These are observed BGP origins, not an inventory of registered allocations or transit reachability.
4376 matching prefix–origin pairs. Each pair appears once; source observations are in Details.
| Prefix | RPKI | Last observed | Details |
|---|---|---|---|
Not Found | 11 Oct 02:00 UTC | 2 source observations
| |
Valid | 11 Oct 00:00 UTC | 1 source observations
| |
Not Found | 11 Oct 02:00 UTC | 2 source observations
| |
Not Found | 11 Oct 02:00 UTC | 2 source observations
| |
Not Found | 11 Oct 02:00 UTC | 2 source observations
| |
Not Found | 11 Oct 02:00 UTC | 2 source observations
| |
Not Found | 11 Oct 02:00 UTC | 2 source observations
| |
Not Found | 11 Oct 02:00 UTC | 2 source observations
| |
Valid | 11 Oct 00:00 UTC | 1 source observations
| |
Valid | 11 Oct 02:00 UTC | 2 source observations
| |
Valid | 11 Oct 02:00 UTC | 2 source observations
| |
Valid | 11 Oct 00:00 UTC | 1 source observations
| |
Valid | 11 Oct 02:00 UTC | 2 source observations
| |
Valid | 11 Oct 00:00 UTC | 1 source observations
| |
Valid | 11 Oct 02:00 UTC | 2 source observations
| |
Valid | 11 Oct 02:00 UTC | 2 source observations
| |
Valid | 11 Oct 02:00 UTC | 2 source observations
| |
Not Found | 11 Oct 02:00 UTC | 2 source observations
| |
Not Found | 11 Oct 02:00 UTC | 2 source observations
| |
Not Found | 11 Oct 02:00 UTC | 2 source observations
| |
Valid | 11 Oct 02:00 UTC | 2 source observations
| |
Not Found | 11 Oct 02:00 UTC | 2 source observations
| |
Not Found | 11 Oct 02:00 UTC | 2 source observations
| |
Not Found | 11 Oct 00:00 UTC | 1 source observations
| |
Not Found | 11 Oct 00:00 UTC | 1 source observations
|
Observed AS neighbors
25 unique neighbors in the selected local snapshots. This is the available collector dataset, not a complete map of the Internet. Adjacency does not establish upstream service or peering.
25 matching neighbors · 1–25 shown
| Network | IPv4/IPv6 | Seen in | Last observed | Details |
|---|---|---|---|---|
AS174 ·  US Cogent Communications, LLC | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 11 Oct 02:00 UTC | Source observations
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AS1299 ·  SE TWELVE99 Arelion Sweden AB | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 11 Oct 02:00 UTC | Source observations
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AS2914 · US NTT-DATA-2914 - NTT America, Inc. | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 11 Oct 02:00 UTC | Source observations
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AS3491 ·  HK PCCWG-APAC-HK PCCW Global HK Ltd. | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 11 Oct 02:00 UTC | Source observations
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AS4134 · CN CHINANET-BACKBONE No.31,Jin-rong Street | IPv4, IPv6 | ris-rrc00 | 11 Oct 00:00 UTC | Source observations
|
AS4635 · HK The Hong Kong Internet Exchange Limited | IPv4 | ris-rrc00, routeviews2 | 11 Oct 02:00 UTC | Source observations
|
AS4837 · CN CHINA169-BACKBONE CHINA UNICOM China169 Backbone | IPv6 | routeviews6 | 11 Oct 02:00 UTC | Source observations
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AS6453 · US AS6453 - TATA COMMUNICATIONS AMERICA INC | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 11 Oct 02:00 UTC | Source observations
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AS6939 · US Hurricane Electric LLC | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 11 Oct 02:00 UTC | Source observations
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AS9405 · CN TPS-CN-AS Test platform Service Center | IPv4 | ris-rrc00, routeviews2 | 11 Oct 02:00 UTC | Source observations
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AS9808 · CN CHINAMOBILE-CN China Mobile Communications Group Co., Ltd. | IPv4 | ris-rrc00 | 11 Oct 00:00 UTC | Source observations
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AS23764 · HK CTGNET CTGNet | IPv4 | ris-rrc00, routeviews2 | 11 Oct 02:00 UTC | Source observations
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AS23910 · CN CNGI-CERNET2-AS-AP China Next Generation Internet CERNET2 | IPv6 | ris-rrc00, routeviews6 | 11 Oct 02:00 UTC | Source observations
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AS23911 · CN CNGI-BJIX-AS-AP China Next Generation Internet Beijing IX | IPv6 | ris-rrc00 | 11 Oct 00:00 UTC | Source observations
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AS24310 · CN NGDC-AS-AP Net-Glyph Data Center | IPv4 | ris-rrc00, routeviews2 | 11 Oct 02:00 UTC | Source observations
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AS24348 · CN CNGI-BJ-IX2-AS-AP CERNET2 IX at Tsinghua University | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 11 Oct 02:00 UTC | Source observations
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AS24361 · CN CNGI-NJ-IX-AS-AP CERNET2 IX at Southeast University | IPv6 | ris-rrc00, routeviews6 | 11 Oct 02:00 UTC | Source observations
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AS58453 · HK CMI-INT-HK China Mobile International Limited | IPv4, IPv6 | ris-rrc00, routeviews2, routeviews6 | 11 Oct 02:00 UTC | Source observations
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AS131578 · CN BFSUNET Beijing Foreign Studies University | IPv4 | ris-rrc00 | 11 Oct 00:00 UTC | Source observations
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AS133111 · CN CNT-NORTHCHINA CERNET New Technology Co., Ltd | IPv4 | ris-rrc00, routeviews2 | 11 Oct 02:00 UTC | Source observations
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AS134169 · CN CERNEWTECHRES-AS-CN CERNEWTECH Beijing co.,LTD | IPv4 | ris-rrc00 | 11 Oct 00:00 UTC | Source observations
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AS138441 · CN CNGI-WLQ-IX-AS-AP CERNET2 regional IX at Xinjiang University | IPv6 | ris-rrc00 | 11 Oct 00:00 UTC | Source observations
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AS139139 · CN SYAUNET Shenyang Agricultural University | IPv4 | ris-rrc00, routeviews2 | 11 Oct 02:00 UTC | Source observations
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AS140570 · HK HKBCS-AS-AP Hong Kong Beecloud System Technology Services Limited | IPv4 | ris-rrc00, routeviews2 | 11 Oct 02:00 UTC | Source observations
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AS151229 · CN SAUNET Shenyang Aerospace University | IPv4 | ris-rrc00, routeviews2 | 11 Oct 02:00 UTC | Source observations
|
View observed neighbor graph (up to 15 AS nodes)
Lines mean observed adjacency, with no commercial direction inferred. The table above provides the same evidence and source times.
Showing 14 of 25 matching neighbors, in table sort order, independent of table page.
Peering & locations
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Registry information
No cached registry response is available yet. Routing origins above are not a substitute for registry ownership.
Allocation statistics
NRO/RIR delegated-extended records describe allocation or assignment ranges. They do not prove a BGP announcement or replace more-specific RDAP registration information. Country is the allocation record’s registration country, not the physical location of every address.
- AS4538–AS4538 · apnic · assigned · ASN allocation country: CN · Allocation date: 2002-08-01 — NRO/RIR data · snapshot 10 Oct 00:00 UTC
Prefix count history
Local observation changes
Only comparable successful snapshots are compared. First imports, changed peer coverage and collection gaps are baselines, not new global routes or withdrawals. RPKI transition history is not available before it has been recorded.
No retained changes are available for this resource.
Retained local prefix-count observations
Separate collector series. Missing rows are not zero. Peer-set changes are separate coverage, not a continuous trend.
| Source | Snapshot | Family | Prefixes | Peer coverage |
|---|---|---|---|---|
routeviews2 | 11 Oct 02:00 UTC | IPv4 | 934 | 140.192.8.16/IPv4 |
routeviews6 | 11 Oct 02:00 UTC | IPv6 | 894 | 2406:840:feed:2::1/IPv6 |
routeviews2 | 11 Oct 00:00 UTC | IPv4 | 934 | 140.192.8.16/IPv4 |
ris-rrc00 | 11 Oct 00:00 UTC | IPv6 | 9 | 2a00:5884::6/IPv6, 89.234.186.6/IPv4 |
routeviews6 | 11 Oct 00:00 UTC | IPv6 | 894 | 2406:840:feed:2::1/IPv6 |
ris-rrc00 | 11 Oct 00:00 UTC | IPv4 | 3481 | 2a00:5884::6/IPv6, 89.234.186.6/IPv4 |
ris-rrc00 | 10 Oct 16:00 UTC | IPv4 | 3481 | 2a00:5884::6/IPv6, 89.234.186.6/IPv4 |
ris-rrc00 | 10 Oct 16:00 UTC | IPv6 | 9 | 2a00:5884::6/IPv6, 89.234.186.6/IPv4 |