AS21339 — CONTINGENCYNETWORKS

AS21339 announces 6 IPv4 prefixes covering 3,328 addresses and 0 IPv6 prefixes.

About this network

The AS handle CONTINGENCYNETWORKS is held by Contingency Networks Ltd.

What it's used for

• The address space carries broadband and connectivity services, evidenced by netnames such as UK-CIRRUS1-20190820 and UK-CNL-20140623, and reverse DNS entries pointing to static.e-know.net.
• With 3328 IPv4 addresses announced across 6 prefixes and 28 observed neighbours, the ratio suggests a regional access provider rather than a large transit backbone.

Notable

• Registrants are largely consistent with the announcer, with five of six prefixes registered to Contingency Networks Ltd; the largest block, 45.143.120.0/22, is registered to Cirrus Blue Ltd.
• The address inventory is a mix of /22, /23, and /24 blocks, all located in the United Kingdom, indicating a focused regional footprint.

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

Announced prefixes

• 45.143.120.0/22
• 77.93.143.0/24
• 158.94.215.0/24
• 176.124.68.0/23
• 185.61.164.0/22
• 193.187.99.0/24

Upstream networks

• AS3170 VeloxServ Communications Ltd
• AS49915 Megaport (UK) Limited
• AS6939 Hurricane Electric LLC
• AS20562 Broadband Hosting B.V.
• AS50300 CustodianDC Limited
• AS24482 SG.GS
• AS48185 team.blue NV
• AS57463 NetIX Communications JSC
• AS8218 Zayo Infrastructure France SA

Adjacent networks

• AS3170 VeloxServ Communications Ltd
• AS49915 Megaport (UK) Limited
• AS6939 Hurricane Electric LLC
• AS8218 Zayo Infrastructure France SA
• AS48185 team.blue NV
• AS57463 NetIX Communications JSC
• AS50300 CustodianDC Limited
• AS24482 SG.GS
• AS20562 Broadband Hosting B.V.

Internet exchanges

• London Network Access Point — London, United Kingdom
• Equinix Internet Exchange Paris — Paris, France