AS17645 — NTT-SG-AP ASN - NTT SINGAPORE PTE LTD

AS17645 announces 12 IPv4 prefixes covering 76,544 addresses and 1 IPv6 prefixes.

About this network

The AS handle NTT-SG-AP is held by NTT Singapore Pte Ltd.

What it's used for

• The address space carries residential broadband traffic, evidenced by reverse DNS entries such as cable-dyn.116-51-191-255.ntti.net.sg and cable-dyn.116-51-223-254.ntti.net.sg.
• The network announces 76,544 IPv4 addresses across 27 prefixes and 1 IPv6 prefix, with 16 observed neighbours, indicating an access network serving end-users rather than a transit provider.

Notable

• Registrants consistently identify as NTT Singapore Pte Ltd or IRT-NTT-SG, aligning with the AS holder.
• The address inventory is finely subdivided into numerous /22 and /23 blocks within the 116.51.0.0/16 and 58.65.0.0/16 ranges, typical of a large-scale residential ISP estate.

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

Announced prefixes

• 58.65.0.0/21
• 58.65.8.0/22
• 58.65.12.0/24
• 58.65.14.0/23
• 58.65.16.0/20
• 116.51.0.0/20
• 116.51.32.0/21
• 116.51.48.0/20
• 116.51.64.0/18
• 116.51.128.0/17
• 175.28.8.0/22
• 202.136.160.0/19
• 2402:2c00::/32

Upstream networks

• AS2914 NTT America, Inc.
• AS3491 PCCW Global (HK) Ltd.
• AS4637 Telstra Global
• AS4657 StarHub Ltd
• AS38566 NTTCTNET

Downstream networks

• AS10204 Arcnet NTT MSC ISP
• AS56227 Zurich Financial Services Australia Limited
• AS139896 Kim Chuan Telecommunications Complex
• AS38566 NTTCTNET
• AS46078 Dimension Data AP Kaki Bukit Singapore
• AS45794 NTT Singapore - IP Network (RFC 2270)
• AS10236 AXA Technology Services Asia (HK) Limited
• AS131789 Asahi Kasei International IT Asia Pacific Co., LTD
• AS132018 NATIXIS

Adjacent networks

• AS2914 NTT America, Inc.
• AS3491 PCCW Global (HK) Ltd.
• AS4657 StarHub Ltd
• AS10204 Arcnet NTT MSC ISP
• AS56227 Zurich Financial Services Australia Limited
• AS4637 Telstra Global
• AS38566 NTTCTNET
• AS139896 Kim Chuan Telecommunications Complex
• AS45794 NTT Singapore - IP Network (RFC 2270)
• AS46078 Dimension Data AP Kaki Bukit Singapore
• AS10236 AXA Technology Services Asia (HK) Limited
• AS131789 Asahi Kasei International IT Asia Pacific Co., LTD
• AS132018 NATIXIS
• AS3741 Dimension Data

Internet exchanges

• Equinix Internet Exchange Singapore — Singapore, Singapore