AS1742 HARVARD-UNIV - Harvard University
🇺🇸ARINassigned
Announced Prefixes (BGP)
17total
13 IPv44 IPv6
IPv4 Addresses
Allocated (RIR)197,376
Announced (BGP)204,544
IPv6 Addresses
Allocated (RIR)8.4×10²⁸
Announced (BGP)8.4×10²⁸
Announced Prefixes
(BGP)17|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| Valid | ARINOther IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| No ROA | Other IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 | |
| Valid | ARINOther IRR | 2026-10-11 |
1-10 of 17
1 / 2
Allocated Prefixes
(RIR)9Prefix | Country | RIR | Status |
|---|---|---|---|
| 128.103.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 131.142.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 140.247.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 192.5.66.0/24 | 🇺🇸 US | ARIN | allocated |
| 192.54.223.0/24 | 🇺🇸 US | ARIN | allocated |
| 192.131.102.0/24 | 🇺🇸 US | ARIN | allocated |
| 2602:fca9::/36 | 🇺🇸 US | ARIN | allocated |
| 2607:fb60::/32 | 🇺🇸 US | ARIN | allocated |
| 2620:32:8000::/48 | 🇺🇸 US | ARIN | allocated |
All 17 announced prefixes of AS1742 →
BGP Neighbours
(seen in AS paths)Upstreams (4)
Networks AS1742 hands its own prefixes to: transit providers, or peers at an exchange.
ASPA
No ASPA
External Links
Learn more
- What is an ASN?Autonomous systems, ASN ranges and how they are assigned
- RPKI and route origin validationWhat the RPKI badges on the prefix list mean
- ASPA explainedWhy AS1742 should publish an ASPA object
- IPv4 transfers in the ARIN regionMonthly volume and the latest registry transfers
- ASN data in AI agents and SIEMMCP server and API integrations
API
Open https://api.ipctl.io/v1/asn/1742Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/1742" | jq