AS8143 — CLOUDFLOW

AS8143 announces 8 IPv4 prefixes covering 3,840 addresses and 4 IPv6 prefixes.

About this network

NEBUSRT is held by Neburst LLC, a small cloud/VPS and colocation provider selling Asia-Pacific-optimised virtual servers. The low AS number is not an early-internet pedigree: ARIN registered the organisation in January 2025 and the ASN a few weeks later, so this is a reissued number with a modern holder.

What it's used for

• Virtual-server hosting out of Asia-Pacific points of presence. The evidence lines up in three places at once: the netnames on its /24s are NEBURST-TYO, NEBURST-HKG and NEBURST-SIN, the prefixes are registered to Neburst Networks at Tokyo, Hong Kong and Singapore addresses, and the reverse DNS resolves to per-PoP names such as host-by.tyo.neburst.com.

Notable

• This is a hosting network. Addresses here are servers rented to customers, not subscriber lines — a common source of automated traffic, and a normal thing to see behind proxies and VPN endpoints.
• Its inventory is scattered /24s inside 23.128.0.0/10, roughly 2,048 addresses plus three IPv6 /48s, acquired one block at a time through 2025 and 2026. That fragmentation is worth noticing because it is also the address-broker shape — but here the blocks are registered to the operator itself and carry first-party rDNS, which is exactly what a broker's inventory does not.
• The customer base and the peering skew heavily toward mainland-China-optimised routes, so the addresses are US-registered while the servers are in APAC. Do not geolocate them to the registry country.

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

Announced prefixes

• 23.128.188.0/24
• 23.129.140.0/24
• 23.145.36.0/24
• 23.145.44.0/24
• 23.146.4.0/24
• 23.149.108.0/24
• 23.189.248.0/24
• 152.175.208.0/21
• 2602:f732:1::/48
• 2602:f732:2::/47
• 2602:f732:4::/48
• 2602:f732:a::/48

Upstream networks

• AS49304 SAKURA LINK LIMITED
• AS17476 CloudRadium (HK) Limited
• AS983 Akari Networks LLC

Downstream networks

• AS200772 Neburst Limited

Adjacent networks

• AS49304 SAKURA LINK LIMITED
• AS17476 CloudRadium (HK) Limited
• AS200772 Neburst Limited
• AS983 Akari Networks LLC

Internet exchanges

• Equinix Internet Exchange Singapore — Singapore, Singapore
• BroadBand Internet eXchange Tokyo — Tokyo, Japan