AS204670 — NTT NTT United Kingdom Ltd

AS204670 announces 5 IPv4 prefixes covering 1,280 addresses and 0 IPv6 prefixes.

About this network

The AS handle NTT is held by NTT United Kingdom Ltd.

What it's used for

• The address space carries corporate infrastructure, evidenced by the reverse DNS record smtp190.knotice.com and netnames such as NTTA-128-121.
• The AS announces 1280 IPv4 addresses across 5 prefixes and maintains 2 observed neighbours, a ratio indicative of a small, internal corporate estate rather than a transit or access network.
• Traffic from this AS consists of internal corporate endpoints and services for NTT's UK operations, including email infrastructure and office connectivity.

Notable

• The RDAP registrants for all announced prefixes are listed as NTT America, Inc.; VIPAR, which differs from the AS holder NTT United Kingdom Ltd, reflecting the global NTT group structure where US entities often hold legacy address space for international subsidiaries.
• The inventory consists of five distinct /24 blocks, all located in the United Kingdom, with no IPv6 prefixes announced.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 128.121.15.0/24
• 128.242.94.0/24
• 131.103.30.0/24
• 140.174.224.0/24
• 168.143.179.0/24

Upstream networks

• AS393423 NTT Global Data Centers Americas, INC.
• AS19893 NTT Global Data Centers Americas, INC.

Adjacent networks

• AS393423 NTT Global Data Centers Americas, INC.
• AS19893 NTT Global Data Centers Americas, INC.

Routing security

• RPKI: 5 valid, 0 invalid and 0 not-found announcements; 9 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 12 route objects.
• Listed in as-sets: AS-RAGINGWIRE.