AS391 AFCONC-BLOCK1-AS - Air Force Systems Networking
Announced Prefixes (BGP)
40total
40 IPv40 IPv6
IPv4 Addresses
Allocated (RIR)262,144
Announced (BGP)285,952
IPv6 Addresses
Allocated (RIR)0
Announced (BGP)0
Prefix Limit (IPv4)
500
Prefix Limit (IPv6)
5
Allocated
-
Announced Prefixes
(BGP)40|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| No ROA | - | 2026-10-11 | |
| No ROA | - | 2026-10-11 | |
| No ROA | - | 2026-10-11 | |
| No ROA | - | 2026-10-11 | |
| No ROA | - | 2026-10-11 | |
| No ROA | - | 2026-10-11 | |
| No ROA | - | 2026-10-11 | |
| No ROA | - | 2026-10-11 | |
| No ROA | - | 2026-10-11 | |
| No ROA | - | 2026-10-11 |
1-10 of 40
1 / 4
Allocated Prefixes
(RIR)4Prefix | Country | RIR | Status |
|---|---|---|---|
| 128.202.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 128.236.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 137.0.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 137.11.0.0/16 | 🇺🇸 US | ARIN | allocated |
All 40 announced prefixes of AS391 →
BGP Neighbours
(seen in AS paths)Upstreams (1)
Networks AS391 hands its own prefixes to: transit providers, or peers at an exchange.
- AS27064United States Department Of Defense DoD40
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 AS391 should publish an ASPA object
- IPv4 transfer marketTransfers published by all five RIRs
- ASN data in AI agents and SIEMMCP server and API integrations
API
Open https://api.ipctl.io/v1/asn/391Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/391" | jq