66.81.136.0/21
🇺🇸CIDR
66.81.136.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇺🇸 United States
City
Seattle (Downtown Seattle)
RIR
ARIN
Status
allocated
Allocated
7/2/2025
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 66.81.136.0/21 | AS27022SIYEH-ASN-1 - Siyeh Corporation | Valid | ARIN | 5/31/2026 |
Covering Prefix
4 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 66.81.136.0/23 | AS27022SIYEH-ASN-1 - Siyeh Corporation | Valid | — | 5/31/2026 |
| 66.81.140.0/23 | AS27022SIYEH-ASN-1 - Siyeh Corporation | Valid | — | 5/31/2026 |
| 66.81.138.0/24 | AS27022SIYEH-ASN-1 - Siyeh Corporation | Valid | — | 5/31/2026 |
| 66.81.142.0/24 | AS27022SIYEH-ASN-1 - Siyeh Corporation | Valid | — | 5/31/2026 |
Origin ASN
AS27022
SIYEH-ASN-1 - Siyeh Corporation
Geolocation
Country🇺🇸United StatesUS
RegionWashington
CitySeattle (Downtown Seattle)
Coordinates47.6143, -122.3390 ↗
API
Open https://api.ipctl.io/v1/prefix/66.81.136.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/66.81.136.0/21" | jq
External Links