AS7721 — QC-NET Qin Cloud Networks

Network type: hosting

AS7721 announces 1 IPv4 prefixes covering 256 addresses and 9 IPv6 prefixes.

About this network

QC-NET is Qin Cloud Networks, a small Hong Kong network that presents itself as a cloud operator, publishes a looking glass, and carries a MANRS badge. It is a leaf network: several upstreams, no downstream customers.

What it's used for

• Almost all of its footprint is IPv6. It announces more than a dozen IPv6 prefixes drawn from RIPE, ARIN and APNIC ranges, against a single IPv4 /24.
• The network buys transit from a handful of small providers, including AS7720, another compact cloud operator — the low-cost BGP transit niche that keeps micro-ASNs routed.
• There is no public reverse DNS on the IPv4 space, so its actual workload cannot be confirmed from rDNS.

Notable

• Its only IPv4 prefix is not its own. The /24 sits inside 44.0.0.0/9 — AMPRNet, the amateur-radio address space administered by Amateur Radio Digital Communications (ARDC). ARIN records the parent block to ARDC, complete with ARDC's own geofeed. Whatever Qin Cloud runs on those addresses, the block's registry lineage is the ham-radio network, not a commercial hosting allocation.
• That single fact means the prefix should not be geolocated or attributed by inference from the 44/8 block's history, and equally that a "44-net means amateur radio" heuristic will misfire here.
• Do not read the low AS number as early-internet pedigree. This is a modern, recently established operator that happens to hold a recycled low number.

Interesting

• The whole IPv4 presence is 256 addresses. An operator this small holding a four-digit AS number, announcing across three RIRs' IPv6 ranges, and routing an amateur-radio /24 is a good illustration of how little the AS number now tells you about a network's age, size or purpose.

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

Announced prefixes

• 44.31.43.0/24
• 2406:840:9970::/44
• 2406:4440:f000::/44
• 2602:fbda:600::/48
• 2602:fbda:610::/48
• 2602:fbda:620::/48
• 2602:fbda:660::/44
• 2a0e:b107:1522::/48
• 2a13:b487:1200::/42
• 2a14:67c3:660::/44

Upstream networks

• AS955 LSHIY LLC
• AS17433 Hytron Network Services Limited
• AS7720 Skywolf Technology LLC
• AS214481 Wojciech Czapkowicz
• AS20473 The Constant Company, LLC
• AS139317 Ningbo Dahuamao Information Technology Co Ltd
• AS44324 MoeDove LLC

Adjacent networks

• AS955 LSHIY LLC
• AS17433 Hytron Network Services Limited
• AS7720 Skywolf Technology LLC
• AS214481 Wojciech Czapkowicz
• AS20473 The Constant Company, LLC
• AS139317 Ningbo Dahuamao Information Technology Co Ltd
• AS44324 MoeDove LLC