75.75.80.0/20 - Comcast Cable Communications (AS21508)
CIDR
75.75.80.0/20
IP Version
IPv4
Addresses
4K
Mask
/20 (255.255.240.0)
Country
🇺🇸 United States
City
Ashburn
RIR
ARIN
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
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| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 75.75.80.0/20 | AS21508 COMCAST-21508 - Comcast Cable Communications, LLC | Valid | - | 2026-10-11 |
Covering Prefix
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 75.75.0.0/17 | AS7922 COMCAST-7922 - Comcast Cable Communications, LLC | Valid | - | 2026-10-11 |
Transfer History
Registry transfers of 75.75.80.0/20, blocks inside it, or blocks containing it.
- 75.75.0.0/17M&A ·
| Date | Resource | From | To | Type |
|---|---|---|---|---|
| 75.75.0.0/17 | M&A |
Related Prefixes
More prefixes of AS21508
All prefixes of AS21508 →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 ARIN regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/75.75.80.0/20Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/75.75.80.0/20" | jq
External Links