Autonomous system
AS3949 NTTA-3946 - NTT America, Inc.
Unclassified ARIN
Summary
NTT America, Inc.
isp hosting legacy
A customer-facing ASN of NTT America, Inc. (NTTA-3946), the US arm of the Japanese telecom group NTT.
What it's used for
- Announces dozens of small prefixes drawn from NTT's ranges across North America, Europe, and Asia-Pacific — the shape of an ASN used to originate customer and hosted networks rather than to carry backbone transit.
- NTT's global transit network is a separate ASN, AS2914.
Notable
- NTT America traces back to Verio, the US hosting and internet provider NTT acquired in 2000; the company holds a contiguous run of low-numbered ASNs in the 3936–3949 range, of which this is the last.
- Provider address space, so an IP here belongs to NTT or one of its customers, not to a single organisation.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS2914 | NTT America, Inc. | 2,147 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-07, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 32 prefixes · 11.52K addresses IPv6 16 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 48 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS3946- Registry name
- NTTA-3946
- Registrant
- NTT America, Inc.
- Abuse contact
- abuse@ntt.net
- Registered
- 2001-01-31
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 69% valid · 50 valid, 9 with no ROA 13 RPKI-invalid
- ROAs
- 697 authorising AS3949
- ASPA
- no ASPA record
- IRR
- 63% registered · 45 of 72 announcements 4 other origin
- Route objects
- 344 naming AS3949
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 454 networks and 1,852 prefixes, as published 2026-11-08. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere