Autonomous system
AS37918 ECL-INET Nippon Telegraph and Telephone Corporation
Unclassified APNIC
Summary
NTT
telecom business japan infrastructure
The AS handle ECL-INET is held by NTT, Inc.
What it's used for
- The address space is registered under the netname
NTTECL-JPwith registrant "Nippon Telegraph and Telephone Corporation; Network Information Center; IRT-NTTECL-JP; CIO Office". - The AS announces 69,376 IPv4 addresses across 10 prefixes and 1 IPv6 prefix, while maintaining 11 observed routing neighbours.
- This inventory supports NTT's corporate and internal network operations, including the NTT Software Innovation Center, rather than serving as a public residential access network.
Notable
- All registrant data for the announced prefixes aligns with the announcer, consistently listing Nippon Telegraph and Telephone Corporation.
- The address inventory is dominated by a single /16 block (129.60.0.0/16) and a series of smaller /24 to /28 blocks within the 192.68.235.0/24 range, indicating a segmented corporate estate.
- The operator was formerly known as Nippon Telegraph and Telephone Corporation before renaming to NTT, Inc.
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
6 upstream, 0 downstream and 7 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 10 prefixes · 69.38K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 11 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS37918- Registry name
- ECL-INET
- Abuse contact
- hostmaster@nic.ad.jp
- Registered
- 2006-01-30
- Last changed
- 2025-12-20
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 23 with no ROA
- ROAs
- 0 authorising AS37918
- ASPA
- no ASPA record
- IRR
- 91% registered · 21 of 23 announcements
- Route objects
- 22 naming AS37918
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: 442 networks and 1,773 prefixes, as published 2026-10-13. 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