138.51.0.0/16
🇨🇦CIDR
138.51.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇨🇦 Canada
City
Toronto (Old Toronto)
RIR
ARIN
Status
allocated
Allocated
2/6/1990
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 138.51.0.0/16 | AS239UTORONTO-AS - University of Toronto | No ROA | — | 6/1/2026 |
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 138.51.0.0/17 | AS239UTORONTO-AS - University of Toronto | No ROA | — | 6/1/2026 |
| 138.51.128.0/17 | AS239UTORONTO-AS - University of Toronto | No ROA | — | 6/1/2026 |
Origin ASN
AS239
UTORONTO-AS - University of Toronto
Geolocation
API
Open https://api.ipctl.io/v1/prefix/138.51.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/138.51.0.0/16" | jq
External Links