209.51.40.0/21 - Isp.Net (AS27501)
CIDR
209.51.40.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇺🇸 United States
City
Las Vegas
RIR
ARIN
Status
allocated
Allocated
2020-05-29
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 209.51.40.0/21 | AS27501 ISPNET-AS - isp.net | Valid | ARINOther IRR | 2026-10-11 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 209.51.40.0/21 | AS27501 | /24 | arin |
Transfer History
Registry transfers of 209.51.40.0/21, blocks inside it, or blocks containing it.
- 209.51.40.0/21M&A ·
- 209.51.40.0/21Transfer ·
- 209.51.32.0/20M&A ·
Origin ASN
AS27501
ISPNET-AS - isp.net
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/209.51.40.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/209.51.40.0/21" | jq
External Links