Autonomous system
AS23639 NTT-BIZLINK NTT Bizlink, Inc.
Unclassified ARIN
Summary
NTT Bizlink
business japan ntt
NTT-BIZLINK is operated by NTT Bizlink, Inc., a subsidiary of the NTT Group.
What it's used for
- The address space carries business connectivity, evidenced by reverse DNS entries such as
bbx-biz7010a.nttbiz.comandbbx-biz5020.nttbiz.com. - The AS announces 6144 IPv4 addresses across 4 prefixes and 1 IPv6 prefix, with only 2 observed neighbours, indicating a role focused on serving specific business customers rather than general transit.
Notable
- All registrants for the announced prefixes are listed as NTT BizLink, Inc., matching the AS holder.
- The address inventory consists of four distinct IPv4 blocks in Japan, all registered under the same netname
ntt-bizlink.
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.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 6.14K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 5 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS23639- Registry name
- ntt-bizlink
- Abuse contact
- hostmaster@nic.ad.jp
- Registered
- 2003-01-31
- Last changed
- 2024-05-24
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 14 with no ROA
- ROAs
- 0 authorising AS23639
- ASPA
- no ASPA record
- IRR
- 93% registered · 13 of 14 announcements
- Route objects
- 7 naming AS23639
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: 447 networks and 1,845 prefixes, as published 2026-10-31. 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