AS9506 — SINGTEL-FIBRE Singtel Fibre Broadband

Network type: residential

AS9506 announces 145 IPv4 prefixes covering 924,928 addresses and 15 IPv6 prefixes.

About this network

AS9506 (SINGTEL-FIBRE) is held by Singapore Telecommunications Ltd (Singtel) and carries its consumer fibre broadband service. Unlike Singtel's international backbone or enterprise ASes, this one exists for a single purpose: terminating residential subscribers in Singapore.

What it's used for

Every piece of evidence lines up on an eyeball access network. AS9506 announces 80 IPv4 prefixes covering roughly 983,040 addresses — close to a million — including large blocks like 116.14.0.0/15, 121.6.0.0/16, 219.74.0.0/16 and 42.60.0.0/16. Alongside that sit 283 IPv6 prefixes out of Singtel's 2400:d801::/32 and 2400:d802:: space, which is the fingerprint of an ISP handing out per-customer IPv6 delegations at scale.

The neighbour count is the confirming signal, and it works in the opposite direction from a carrier's. Only about 2 BGP neighbours are observed. A transit provider holding a million addresses would peer with hundreds of networks; this AS reaches the world through Singtel's own upstream ASes and does nothing else. That is exactly how a large operator structures a dedicated access AS.

Reverse DNS closes the case. Sampled addresses across the announced ranges resolve to generated names of the form bb116-14-0-5.singnet.com.sg — the bb prefix denoting broadband, under SingNet, Singtel's consumer ISP brand. This is subscriber space.

Notable

• Traffic originating here is residential end users, so it should be treated as consumer eyeball space for geolocation, abuse and rate-limiting purposes.
• The IPv6 footprint is far broader than the IPv4 one in prefix count, reflecting per-subscriber delegations rather than a shared pool.
• Singtel operates several separate ASes; this is the retail broadband one, not the international carrier network.

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

Announced prefixes

• 14.100.0.0/17
• 42.60.0.0/17
• 42.60.128.0/21
• 42.60.136.0/23
• 42.60.140.0/22
• 42.60.144.0/20
• 42.60.160.0/19
• 42.60.192.0/21
• 42.60.200.0/23
• 42.60.204.0/22
• 42.60.208.0/20
• 42.60.224.0/22
• 42.60.230.0/23
• 42.60.232.0/21
• 42.60.240.0/21
• 42.60.250.0/23
• 42.60.252.0/22
• 42.61.128.0/24
• 42.61.192.0/20
• 42.61.208.0/22
• 42.61.240.0/22
• 101.78.64.0/19
• 101.78.96.0/20
• 101.78.112.0/21
• 101.78.120.0/22
• 101.78.124.0/23
• 101.78.126.0/24
• 103.67.168.0/23
• 115.66.0.0/19
• 115.66.32.0/20
• 115.66.48.0/21
• 115.66.64.0/18
• 115.66.128.0/17
• 116.14.0.0/16
• 116.15.0.0/18
• 116.15.64.0/19
• 116.15.96.0/20
• 116.15.112.0/21
• 116.15.124.0/22
• 116.15.128.0/17
• 118.200.0.0/17
• 118.200.133.0/24
• 118.200.137.0/24
• 118.200.143.0/24
• 118.200.148.0/24
• 118.200.175.0/24
• 118.200.179.0/24
• 118.200.184.0/23
• 118.200.188.0/24
• 118.200.190.0/24
• 118.200.192.0/18
• 118.201.224.0/23
• 118.201.230.0/23
• 118.201.249.0/24
• 118.201.250.0/23
• 119.74.0.0/18
• 119.74.64.0/19
• 119.74.96.0/20
• 119.74.112.0/22
• 119.74.116.0/23
• 119.74.119.0/24
• 119.74.120.0/21
• 119.74.128.0/17
• 119.234.128.0/18
• 119.234.192.0/19
• 121.6.0.0/17
• 121.6.128.0/18
• 121.6.192.0/19
• 121.6.224.0/20
• 121.6.240.0/21
• 121.6.248.0/22
• 121.6.253.0/24
• 121.6.254.0/23
• 121.7.0.0/21
• 121.7.8.0/22
• 121.7.12.0/24
• 121.7.14.0/23
• 121.7.16.0/20
• 121.7.32.0/19
• 121.7.64.0/18
• 121.7.128.0/17
• 128.106.64.0/20
• 128.106.80.0/22
• 128.106.88.0/21
• 128.106.96.0/19
• 128.106.128.0/20
• 128.106.144.0/21
• 128.106.152.0/22
• 128.106.158.0/23
• 128.106.160.0/19
• 128.106.192.0/18
• 151.192.64.0/18
• 151.192.128.0/17
• 160.213.32.0/21
• 160.213.56.0/21
• 160.213.128.0/20
• 160.213.224.0/19
• 165.21.24.0/22
• 165.21.28.0/23
• 165.21.30.0/24

and 60 more.

Upstream networks

• AS3758 SingNet

Downstream networks

• AS135600 Whiz Communications Pte Ltd

Adjacent networks

• AS3758 SingNet
• AS135600 Whiz Communications Pte Ltd