204.146.0.0/16 - AT&T Enterprises (AS7018)
CIDR
204.146.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇺🇸 United States
City
Armonk
RIR
ARIN
Status
allocated
Allocated
1994-09-12
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 204.146.0.0/16 | AS7018 ATT-INTERNET4 - AT&T Enterprises, LLC | Valid | ARIN | 2026-10-12 |
More-Specific Announcements
1 more-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 204.146.159.0/24 | AS203 CENTURYLINK-LEGACY-LVLT-203 - Level 3 Parent, LLC | Invalid | - | 2026-10-12 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 204.146.0.0/16 | AS7018 | /16 | arin |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS7018 | ARIN | MNT-AEL-360 | 2026-06-29 |
Transfer History
Registry transfers of 204.146.0.0/16, blocks inside it, or blocks containing it.
- 204.146.0.0/16M&A ·
- 204.146.0.0/16M&A ·
Related Prefixes
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/204.146.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/204.146.0.0/16" | jq
External Links