CERNET2 IX at Tsinghua University
BGP inherited
Cluster stats
| Netblocks | 38 · 510 IPv4 addresses |
| All fragments | 1,454 blocks across 22 clusters |
| Cluster ID | 214480304 |
| Registry | BGP |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | BGP parent (inherited) |
| Shared handles | clustered on 1 shared RIR contact/maintainer handle |
| Registry names | 1 distinct registrant name across these blocks |
| full provenance (JSON) → · how attribution works | |
Footprint over time
5 weekly snapshots · JSON
38
0 netblocks since 2026-07-05
2026-07-05
peak 38
2026-07-19
IP Ranges (38)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 202.38.109.0/24 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 202.112.4.0/24 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:250:2::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:250:209::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:250:217::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:250:219::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:250:21a::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:250:21b::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:250:23b::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:250:248::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:250:24f::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:250:803::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:250:c006::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:a0::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:20b::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:20e::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:210::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:211::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:212::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:21a::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:21f::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:222::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:232::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:23d::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:243::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:258::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:266::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:da8::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2001:da8:aaa9::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2402:7d80:240::/48 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 2403:3140::/32 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 240c:c035::/32 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 240c:c0a8::/33 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 240c:c0a8::/34 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 240c:c0a8:4000::/34 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 240c:c0a8:8000::/33 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 240c:c0a8:8000::/34 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
| 240c:c0a8:c000::/34 | CERNET2 IX at Tsinghua University | BGP | ANNOUNCED | ● high |
Domains hosted in this network
what's this?Network trust
what's this?
RPKI hygiene: B
how networks compare →
89.5%
of checked blocks have valid RPKI ROA coverage
(34 of 38)
Possible discrepancies (26)
These blocks are registered to CERNET2 IX at Tsinghua University 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.
| 240c:c0a8::/33 /33 | authorized for AS4538 — China Education and Research Network Center |
| 240c:c0a8:8000::/33 /33 | authorized for AS4538 — China Education and Research Network Center |
| 240c:c0a8::/34 /34 | authorized for AS4538 — China Education and Research Network Center |
| 240c:c0a8:4000::/34 /34 | authorized for AS4538 — China Education and Research Network Center |
| 240c:c0a8:8000::/34 /34 | authorized for AS4538 — China Education and Research Network Center |
| 240c:c0a8:c000::/34 /34 | authorized for AS4538 — China Education and Research Network Center |
| 2001:250:2::/48 /48 | authorized for AS4538 — China Education and Research Network Center |
| 2001:250:209::/48 /48 | authorized for AS4538 — China Education and Research Network Center |
| 2001:250:219::/48 /48 | authorized for AS4538 — China Education and Research Network Center |
| 2001:250:21b::/48 /48 | authorized for AS4538 — China Education and Research Network Center |
| 2001:250:23b::/48 /48 | authorized for AS4538 — China Education and Research Network Center |
| 2001:250:24f::/48 /48 | authorized for AS4538 — China Education and Research Network Center |
| 2001:250:803::/48 /48 | authorized for AS4538 — China Education and Research Network Center |
| 2001:da8:a0::/48 /48 | authorized for AS4538 — China Education and Research Network Center |
| 2001:da8:20b::/48 /48 | authorized for AS4538 — China Education and Research Network Center |
+11 more — see the REST API
NIC Handles
AS24348