209.135.128.0/20
🇺🇸CIDR
209.135.128.0/20
IP Version
IPv4
Addresses
4K
Mask
/20 (255.255.240.0)
Country
🇺🇸 United States
City
St Louis
RIR
ARIN
Status
allocated
Allocated
9/5/1997
Announced BGP Routes
0 of 0 routesRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| This prefix is not currently announced in BGP. See covering prefix below. | ||||
Covering Prefix
10 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 209.135.143.0/24 | AS6428CDM - CDM | No ROA | — | 6/1/2026 |
| 209.135.132.0/24 | AS6428CDM - CDM | No ROA | — | 6/1/2026 |
| 209.135.133.0/24 | AS6428CDM - CDM | No ROA | — | 6/1/2026 |
| 209.135.134.0/24 | AS6428CDM - CDM | No ROA | — | 6/1/2026 |
| 209.135.135.0/24 | AS6428CDM - CDM | No ROA | — | 6/1/2026 |
| 209.135.136.0/24 | AS6428CDM - CDM | No ROA | — | 6/1/2026 |
| 209.135.140.0/24 | AS6428CDM - CDM | No ROA | — | 6/1/2026 |
| 209.135.128.0/24 | AS6428CDM - CDM | No ROA | — | 6/1/2026 |
| 209.135.141.0/24 | AS6428CDM - CDM | No ROA | — | 6/1/2026 |
| 209.135.140.0/24 | AS17378AS17378 - TierPoint, LLC | No ROA | — | 6/1/2026 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 209.135.136.0/21 | AS13962 | 🇺🇸US | allocated |
| 209.135.132.0/22 | AS13962 | 🇺🇸US | allocated |
| 209.135.128.0/23 | AS13962 | 🇺🇸US | allocated |
| 209.135.130.0/24 | AS402522 | 🇺🇸US | allocated |
| 209.135.131.0/24 | AS13962 | 🇺🇸US | allocated |
Origin ASN
AS13962
Geolocation
API
Open https://api.ipctl.io/v1/prefix/209.135.128.0/20Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/209.135.128.0/20" | jq
External Links