170.138.0.0/16
🇺🇸CIDR
170.138.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇺🇸 United States
City
Plymouth
RIR
ARIN
Status
allocated
Allocated
5/18/1994
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 170.138.0.0/16 | AS10879UHC - Unitedhealthcare | No ROA | RADB | 5/31/2026 |
Covering Prefix
11 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 170.138.172.0/22 | AS10879UHC - Unitedhealthcare | No ROA | — | 5/31/2026 |
| 170.138.254.0/23 | AS10879UHC - Unitedhealthcare | No ROA | — | 5/31/2026 |
| 170.138.27.0/24 | AS10879UHC - Unitedhealthcare | No ROA | — | 5/31/2026 |
| 170.138.53.0/24 | AS10879UHC - Unitedhealthcare | No ROA | — | 5/31/2026 |
| 170.138.144.0/24 | AS10879UHC - Unitedhealthcare | No ROA | — | 5/31/2026 |
| 170.138.170.0/24 | AS10879UHC - Unitedhealthcare | No ROA | — | 5/31/2026 |
| 170.138.29.0/24 | AS10879UHC - Unitedhealthcare | No ROA | — | 5/31/2026 |
| 170.138.176.0/24 | AS10879UHC - Unitedhealthcare | No ROA | — | 5/31/2026 |
| 170.138.52.0/24 | AS10879UHC - Unitedhealthcare | No ROA | — | 5/31/2026 |
| 170.138.253.0/24 | AS14045CHANGEHEALTHCARE - UnitedHealth Group Incorporated | No ROA | — | 5/31/2026 |
| 170.138.252.0/24 | AS14045CHANGEHEALTHCARE - UnitedHealth Group Incorporated | No ROA | — | 5/31/2026 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS10879 | RADB | MAINT-UHG | 8/22/2025 |
Origin ASN
AS10879
UHC - Unitedhealthcare
Geolocation
API
Open https://api.ipctl.io/v1/prefix/170.138.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/170.138.0.0/16" | jq
External Links