AS37918 — ECL-INET Nippon Telegraph and Telephone Corporation

AS37918 announces 5 IPv4 prefixes covering 69,376 addresses and 1 IPv6 prefixes.

About this network

The AS handle ECL-INET is held by NTT, Inc.

What it's used for

• The address space is registered under the netname NTTECL-JP with 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.

Announced prefixes

• 129.60.0.0/16
• 192.68.235.0/24
• 192.68.236.0/22
• 192.68.240.0/21
• 192.68.248.0/23
• 2001:df0:45::/48

Upstream networks

• AS2497 Internet Initiative Japan Inc.
• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS6939 Hurricane Electric LLC
• AS17639 Converge ICT Solutions Inc.
• AS24482 SG.GS
• AS20485 Joint Stock Company TransTeleCom

Adjacent networks

• AS2497 Internet Initiative Japan Inc.
• AS2907 Research Organization of Information and Systems, National Institute of Informatics
• AS6939 Hurricane Electric LLC
• AS20485 Joint Stock Company TransTeleCom
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.