China Education and Research Network Center
Data as of 2026-08-16
BGP inherited
Cluster stats
| Netblocks | 5,156 · 17,173,248 IPv4 addresses |
| IPv6 | 10 prefixes (largest 2001:da8:ff00::/40) |
| All fragments | 5,608 blocks across 2 clusters |
| Cluster ID | 222323484 |
| Registry | BGP |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | BGP parent (inherited) |
| Shared handles | clustered on 3 shared RIR contact/maintainer handles |
| Registry names | 1 distinct registrant name across these blocks |
| full provenance (JSON) → · how attribution works · report an issue | |
Footprint over time
8 weekly snapshots · JSON
5,156
+17 netblocks since 2026-07-05
2026-07-05
peak 5,156
2026-08-16
IP Ranges (5,156)
showing 50 of 5,156 — see all — ⬇ export CSV (free export limited to 500 rows — subscribe for the full export)| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 1.51.0.0/16 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.51.3.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.51.16.0/20 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.51.112.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.51.120.0/21 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.51.144.0/21 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.51.144.0/20 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.51.152.0/21 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.51.160.0/21 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.51.168.0/21 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.51.176.0/20 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.51.192.0/18 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.184.0.0/15 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.184.192.0/18 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.185.0.0/18 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.185.64.0/19 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 1.185.192.0/18 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.244.0.0/18 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.244.0.0/16 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.244.64.0/20 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.245.0.0/16 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.246.0.0/15 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.0.0/19 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.1.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.2.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.3.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.5.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.8.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.9.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.12.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.13.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.18.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.19.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.20.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.22.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.29.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.30.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.33.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.44.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.53.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.58.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.94.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.103.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.107.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 42.247.113.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 49.52.0.0/19 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 49.52.0.0/14 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 49.52.0.0/15 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 49.52.32.0/20 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
| 49.52.48.0/24 | China Education and Research Network Center | BGP | ANNOUNCED | ● high |
IPv6 ranges (10)
Network trust
what's this?
RPKI hygiene: C
how networks compare →
55.6%
of checked blocks have valid RPKI ROA coverage
(1,113 of 2,000, sampled from 5,156)
Possible discrepancies (1)
These blocks are registered to China Education and Research Network Center but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.
| 2400:a980:ee::/48 /48 | authorized for AS133111 — CERNET New Technology Co., Ltd |
NIC Handles
AS4538
MAINT-CERNET-AP
MAINT-CNNIC-AP