203.187.128.0/19 - BT British Telecommunications Limited (AS3300)
CIDR
203.187.128.0/19
IP Version
IPv4
Addresses
8.1K
Mask
/19 (255.255.224.0)
Country
🇸🇬 Singapore
City
Singapore (Hougang)
RIR
APNIC
Status
allocated
Allocated
2006-03-29
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 203.187.128.0/19 | AS3300 BT British Telecommunications Limited | Valid | APNIC | 2026-10-11 |
More-Specific Announcements
3 more-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 203.187.128.0/22 | AS3300 BT British Telecommunications Limited | Valid | - | 2026-10-11 |
| 203.187.145.0/24 | AS3300 BT British Telecommunications Limited | Valid | - | 2026-10-11 |
| 203.187.146.0/24 | AS3300 BT British Telecommunications Limited | Valid | - | 2026-10-11 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 203.187.128.0/19 | AS3300 | /24 | apnic |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS3300 | APNIC | MAINT-AP-INFONET | 2022-06-16 |
More Specific Prefixes
Related Prefixes
Geolocation
Abuse Contact
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/203.187.128.0/19Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/203.187.128.0/19" | jq
External Links