202.4.128.0/19 - China Education And Research Network Center (AS4538)
CIDR
202.4.128.0/19
IP Version
IPv4
Addresses
8.1K
Mask
/19 (255.255.224.0)
Country
🇨🇳 China
City
Haidian (Haidian Qu)
RIR
APNIC
Status
allocated
Allocated
1995-02-17
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
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| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 202.4.128.0/19 | AS4538 ERX-CERNET-BKB - China Education and Research Network Center | No ROA | Other IRR | 2026-10-14 |
More-Specific Announcements
10 more-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 202.4.128.0/20 | AS4538 ERX-CERNET-BKB - China Education and Research Network Center | No ROA | - | 2026-10-14 |
| 202.4.128.0/20 | AS24349 CNGI-BJ-IX3-AS-AP - CERNET2 IX at Peking University | No ROA | - | 2026-10-14 |
| 202.4.130.0/24 | AS24349 CNGI-BJ-IX3-AS-AP - CERNET2 IX at Peking University | No ROA | - | 2026-10-14 |
| 202.4.134.0/24 | AS24349 CNGI-BJ-IX3-AS-AP - CERNET2 IX at Peking University | No ROA | - | 2026-10-14 |
| 202.4.135.0/24 | AS24349 CNGI-BJ-IX3-AS-AP - CERNET2 IX at Peking University | No ROA | - | 2026-10-14 |
| 202.4.136.0/24 | AS24349 CNGI-BJ-IX3-AS-AP - CERNET2 IX at Peking University | No ROA | - | 2026-10-14 |
| 202.4.144.0/20 | AS4538 ERX-CERNET-BKB - China Education and Research Network Center | No ROA | - | 2026-10-14 |
| 202.4.144.0/20 | AS24349 CNGI-BJ-IX3-AS-AP - CERNET2 IX at Peking University | No ROA | - | 2026-10-14 |
| 202.4.152.0/24 | AS24349 CNGI-BJ-IX3-AS-AP - CERNET2 IX at Peking University | No ROA | - | 2026-10-14 |
| 202.4.153.0/24 | AS24349 CNGI-BJ-IX3-AS-AP - CERNET2 IX at Peking University | No ROA | - | 2026-10-14 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS4538 | Other IRR | MAINT-AS4637 | 2023-11-13 |
Related Prefixes
More prefixes of AS4538
All prefixes of AS4538 →Geolocation
Learn more
- RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
- RPKI validatorCheck ROA coverage for any prefix or ASN
- What is BGP?How prefixes are announced and routed
- More-specific prefixesGlossary: covering and more-specific routes
- IPv4 transfers in the APNIC regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/202.4.128.0/19Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/202.4.128.0/19" | jq
External Links