Autonomous system
AS17645 NTT-SG-AP ASN - NTT SINGAPORE PTE LTD
Unclassified APNIC NSP
Summary
NTT Singapore
telecom residential access singapore
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.sgandcable-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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Singapore | Singapore, Singapore | 27.111.228.181 |
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 27 prefixes · 76.54K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| SG | Singapore | 28 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS17645- Registry name
- NTT-SG-AP
- Registrant
- NTT Singapore Pte Ltd
- Abuse contact
- ap.eis-netops@global.ntt
- Registered
- 2008-09-04
- Last changed
- 2025-01-30
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- NTT DATA Enterprise Internet Services - SG
- Network type
- NSP
- Scope
- Asia Pacific
- Traffic ratio
- Balanced
- Peering policy
- Selective
- Present at
- 1 exchanges
- Facilities
- 2 facilities
- Website
- https://hello.global.ntt/
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 13 valid, 0 with no ROA
- ROAs
- 17 authorising AS17645
- ASPA
- no ASPA record
- IRR
- 100% registered · 13 of 13 announcements
- Route objects
- 25 naming AS17645
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 1,771 prefixes, as published 2026-10-15. 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