AS21339
Contingency Networks Ltd
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Isp allocation +5
- Trust score 70 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 2 internet exchanges: Equinix Paris: Equinix IX - PA Metro, LONAP: LON0
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 45.143.120.0/22 | 1.0K |
0.1%
|
Contingency Networks Ltd | GB | England | Peterborough |
| 185.61.164.0/22 | 1.0K |
1.2%
|
Contingency Networks Ltd | GB | England | Barrow in Furness |
| 176.124.68.0/23 | 512 |
4.3%
|
Contingency Networks Ltd | GB | England | Stafford |
| 77.93.143.0/24 | 256 |
98.8%
|
GCI Network Solutions Limited | GB | — | — |
| 158.94.215.0/24 | 256 |
0.0%
|
Contingency Networks Ltd | GB | England | Cannock |
| 193.187.99.0/24 | 256 |
0.0%
|
Contingency Networks Ltd | GB | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS21339 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 45.143.122.0/23 | 6,513 | 2026-07-24 15:47:23 |
| 45.143.120.0/23 | 6,502 | 2026-07-24 15:47:23 |
| 176.124.68.0/23 | 6,438 | 2026-07-24 15:47:23 |
| 77.93.143.0/24 | 6,420 | 2026-07-24 15:47:23 |
| 185.61.164.0/22 | 6,417 | 2026-07-24 15:47:23 |
| 193.187.99.0/24 | 6,414 | 2026-07-24 15:47:23 |
| 158.94.215.0/24 | 6,301 | 2026-07-24 15:47:23 |
Frequently Asked Questions
What is AS21339?
AS21339 is an Autonomous System Number assigned to Contingency Networks Ltd. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS21339 announce?
AS21339 announces 3.3K IPv4 addresses distributed across 6 routed CIDR prefixes. The network is registered in United Kingdom.
Who operates AS21339?
AS21339 is operated by Contingency Networks Ltd. The organization is based in United Kingdom. You can view all IP ranges and related ASNs on the organization page.
What country is AS21339 registered in?
AS21339 is registered in United Kingdom. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
