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Autonomous System

AS21491

IDDQD-AS

Announced IPs
65,792
CIDR prefixes
2
ASN
AS21491

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.

57/100
Caution
How this score is built
  • Baseline (neutral) 65
  • Active-threat / abuse risk −12
  • Enterprise allocation +4
  • Trust score 57 / 100

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

About Cable & Wireless

Cable & Wireless plc was a British telecommunications company.

Founded
1860
Headquarters
London
Industry
telecommunications
Parent
Cable & Wireless (Holding), Ltd.

⚠ 1 MOAS prefix — multiple origin ASNs detected

All MOAS anomalies →

A previously stable prefix originated by AS21491 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.

PrefixOrigin ASNsLast detected (UTC)
196.43.226.0/24 AS21491, AS37408 2026-09-10 16:25:46

Top CIDR ranges

CIDRIPsPTR DensityOrganizationCountryStateCity
196.0.0.0/16 65.5K
0.2%
UGANDA-TELECOM Uganda Telecom UG Central Region Kampala
102.220.21.0/24 256
0.0%
UGANDA-TELECOM Uganda Telecom UG

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS21491 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
196.0.0.0/16 583,500 2026-09-10 18:08:31
102.220.21.0/24 185,912 2026-09-10 09:31:27
196.0.21.0/24 24,067 2026-09-10 17:26:23
196.0.7.0/24 24,062 2026-09-10 17:26:23
196.0.22.0/24 24,038 2026-09-10 17:26:23
196.0.6.0/24 24,036 2026-09-10 17:26:23
196.0.23.0/24 24,027 2026-09-10 17:26:23
196.0.104.0/24 23,392 2026-09-10 17:26:16
196.0.128.0/24 19,411 2026-09-10 09:32:30
196.0.5.0/24 19,366 2026-09-09 09:07:37
196.0.69.0/24 19,364 2026-09-09 13:20:10
196.0.37.0/24 19,302 2026-09-09 09:07:37
196.0.121.0/24 19,299 2026-09-09 09:07:37
196.0.54.0/24 19,294 2026-09-10 13:20:36
196.0.47.0/24 19,276 2026-09-10 09:32:30
196.0.26.0/24 19,244 2026-09-10 09:27:19
196.0.29.0/24 19,177 2026-09-09 09:07:37
196.0.39.0/24 19,177 2026-09-09 09:07:37
196.0.30.0/24 19,153 2026-09-09 09:07:37
196.0.13.0/24 19,150 2026-09-10 13:20:36
196.0.2.0/24 19,142 2026-09-09 09:07:37
196.0.25.0/24 19,141 2026-09-10 09:27:19
196.0.8.0/24 19,139 2026-09-09 13:20:10
196.0.89.0/24 19,124 2026-09-09 09:07:37
196.0.27.0/24 19,114 2026-09-10 09:27:19
196.0.42.0/24 19,112 2026-09-09 09:07:37
196.0.45.0/24 19,111 2026-09-10 09:32:30
196.0.28.0/24 19,108 2026-09-09 09:07:37
196.0.49.0/24 19,102 2026-09-09 09:07:37
196.0.102.0/24 19,098 2026-09-09 09:07:37
196.0.109.0/24 19,098 2026-09-09 09:07:37
196.0.110.0/24 19,093 2026-09-09 09:07:37
196.0.101.0/24 19,093 2026-09-09 09:07:37
196.0.36.0/24 19,079 2026-09-09 09:07:37
196.0.43.0/24 19,075 2026-09-09 09:07:37
196.0.1.0/24 19,074 2026-09-09 09:07:37
196.0.4.0/24 19,073 2026-09-09 09:07:37
196.0.19.0/24 19,066 2026-09-09 09:07:37
196.0.40.0/24 19,064 2026-09-09 09:07:37
196.0.111.0/24 19,063 2026-09-09 09:07:37
196.0.32.0/24 19,062 2026-09-09 09:07:37
196.0.10.0/24 19,061 2026-09-09 09:07:37
196.0.35.0/24 19,056 2026-09-09 09:07:37
196.0.50.0/24 12,131 2026-09-09 09:07:37
196.0.58.0/24 10,623 2026-09-10 11:50:01
196.0.87.0/24 10,603 2026-09-10 11:50:01
196.0.86.0/24 10,584 2026-09-10 11:50:01
196.0.90.0/24 10,359 2026-07-11 16:52:23
196.0.9.0/24 9,209 2026-08-03 10:56:15
196.0.248.0/24 8,955 2026-08-03 11:52:56

Showing top 50 of 63 announced prefixes by sample volume.

Frequently Asked Questions

What is AS21491?

AS21491 is an Autonomous System Number assigned to IDDQD-AS. 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 AS21491 announce?

AS21491 announces 65.8K IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in Uganda.

Who operates AS21491?

AS21491 is operated by IDDQD-AS. The organization is based in Uganda. You can view all IP ranges and related ASNs on the organization page.

What country is AS21491 registered in?

AS21491 is registered in Uganda. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-09-10 18:11:07 UTC
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