asn.dev

Autonomous system

AS2511 CORE Nippon Telegraph and Telephone Corporation

Unclassified APNIC

IPv4 addresses 41.73K 5 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly JP
Flagged prefixes 0 none

Summary

Nippon Telegraph and Telephone Corporation (NTT)

Japan · AI-generated

enterprise legacy

This network (CORE) is registered to Nippon Telegraph and Telephone Corporation (NTT), Japan's largest telecommunications company.

What it's used for

  • An NTT-operated network. The CORE handle and modest address footprint suggest operational/backbone use rather than a distinct consumer ISP brand.

Notable

  • Operated by a major national telecom carrier. The low AS number reflects an early Japanese-internet allocation.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Address space

Summary

Full explorer
CountryNamePrefixes
JPJapan5

Registry

Allocation record

via APNIC RDAP
Registry
APNIC
Handle
AS2511
Registry name
CORE
Abuse contact
hostmaster@nic.ad.jp
Last changed
2023-03-17
Status
active

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

No IC3 indicators Nothing from the FBI IC3 feed.

Threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check