AS3949 NTTA-3946 - NTT America, Inc.
Announced Prefixes (BGP)
77total
76 IPv41 IPv6
IPv4 Addresses
Allocated (RIR)8,192
Announced (BGP)38,400
IPv6 Addresses
Allocated (RIR)0
Announced (BGP)1.2×10²⁴
Prefix Limit (IPv4)
200
Prefix Limit (IPv6)
5
Allocated
-
Routing hygiene
Score 79/100 · High riskRPKI ROA coverage
53.2%
23 prefixes RPKI invalid
IRR route objects
32.5%
15 prefixes registered for another origin
Hijack signals
19
19 announced against others' ROAs, 0 own announced by others
Upstreams
1
diversity 0/100
- Announces 19 prefixes that RPKI assigns to another network (possible hijack or misconfiguration)
- 47% of announced prefixes (36 of 77) have no valid ROA, 23 of them RPKI invalid
- 68% of announced prefixes (52 of 77) have no IRR route object for this ASN
- 5 prefixes registered in IRR route objects for another active network and not authorized by a ROA
- Only one upstream seen in the AS paths of its routes
Based on 77 announced prefixes, updated daily (2026-10-25). How the score works · RPKI explained
Announced Prefixes
(BGP)77|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| Valid | ARIN | 2026-10-26 | |
| Valid | ARIN | 2026-10-26 | |
| Valid | ARIN | 2026-10-26 | |
| Valid | ARIN | 2026-10-26 | |
| No ROA | RIPE | 2026-10-26 | |
| No ROA | - | 2026-10-26 | |
| Valid | - | 2026-10-26 | |
| Valid | RIPE | 2026-10-26 | |
80.174.148.0/22MOAS | Invalid | - | 2026-10-26 |
| Invalid | - | 2026-10-26 |
1-10 of 77
1 / 8
Allocated Prefixes
(RIR)13Prefix | Country | RIR | Status |
|---|---|---|---|
| 45.149.225.0/24 | 🇬🇧 GB | RIPE | assigned |
| 45.149.226.0/24 | 🇭🇰 HK | RIPE | assigned |
| 62.73.186.0/24 | 🇬🇧 GB | RIPE | assigned |
| 80.174.148.0/22 | 🇩🇪 DE | RIPE | assigned |
| 91.123.72.0/22 | 🇨🇿 CZ | RIPE | assigned |
| 171.22.145.0/24 | 🇩🇪 DE | RIPENCC | allocated |
| 185.243.129.0/24 | 🇩🇪 DE | RIPENCC | allocated |
| 193.28.144.0/24 | 🇺🇸 US | RIPENCC | allocated |
| 193.28.148.0/24 | 🇺🇸 US | RIPENCC | allocated |
| 193.39.136.0/24 | 🇬🇧 GB | RIPENCC | assigned |
1-10 of 13
1 / 2
All 77 announced prefixes of AS3949 →
BGP Neighbours
(seen in AS paths)Upstreams (1)
Networks AS3949 hands its own prefixes to: transit providers, or peers at an exchange.
- AS2914NTT America86
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 AS3949 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/3949Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/3949" | jq