140.247.0.0/16
🇺🇸CIDR
140.247.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇺🇸 United States
City
Cambridge (Cambridgeport)
RIR
ARIN
Status
allocated
Allocated
9/18/1992
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 140.247.0.0/16 | AS1742HARVARD-UNIV - Harvard University | Valid | ARINRADB | 6/1/2026 |
Covering Prefix
4 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 140.247.111.0/24 | AS1742HARVARD-UNIV - Harvard University | Valid | — | 6/1/2026 |
| 140.247.152.0/24 | AS1742HARVARD-UNIV - Harvard University | Valid | — | 6/1/2026 |
| 140.247.174.0/24 | AS1742HARVARD-UNIV - Harvard University | Valid | — | 6/1/2026 |
| 140.247.236.0/24 | AS1742HARVARD-UNIV - Harvard University | Valid | — | 6/1/2026 |
Origin ASN
AS1742
HARVARD-UNIV - Harvard University
Geolocation
Country🇺🇸United StatesUS
RegionMassachusetts
CityCambridge (Cambridgeport)
Coordinates42.3596, -71.1153 ↗
API
Open https://api.ipctl.io/v1/prefix/140.247.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/140.247.0.0/16" | jq
External Links