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
- Mobile allocation +2
- Trust score 67 / 100
Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS12091 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 |
|---|---|---|
| 197.65.128.0/17 | 155,354 | 2026-11-13 08:54:18 |
| 197.65.0.0/17 | 154,619 | 2026-11-13 08:54:18 |
| 197.68.224.0/19 | 153,615 | 2026-11-13 08:54:18 |
| 197.68.192.0/19 | 153,363 | 2026-11-13 08:54:18 |
| 197.68.128.0/19 | 153,305 | 2026-11-13 08:54:18 |
| 197.68.160.0/19 | 153,141 | 2026-11-13 08:54:18 |
| 197.69.96.0/19 | 149,436 | 2026-11-13 08:54:18 |
| 197.69.64.0/19 | 149,381 | 2026-11-13 08:54:18 |
| 197.64.0.0/19 | 149,072 | 2026-11-13 08:54:18 |
| 197.64.32.0/19 | 148,954 | 2026-11-13 08:54:18 |
| 41.124.128.0/17 | 148,930 | 2026-11-13 08:54:18 |
| 197.69.0.0/19 | 148,386 | 2026-11-13 08:54:18 |
| 197.64.0.0/17 | 148,347 | 2026-11-13 08:54:18 |
| 197.69.32.0/19 | 147,150 | 2026-11-13 08:54:18 |
| 41.119.128.0/19 | 146,112 | 2026-11-13 08:54:18 |
| 41.117.0.0/17 | 146,014 | 2026-11-13 08:54:18 |
| 41.119.160.0/19 | 145,880 | 2026-11-13 08:54:18 |
| 197.64.128.0/17 | 141,831 | 2026-11-13 08:54:18 |
| 197.68.96.0/19 | 137,431 | 2026-11-13 08:54:18 |
| 197.64.64.0/19 | 136,482 | 2026-11-13 08:54:18 |
| 41.119.64.0/18 | 133,602 | 2026-11-13 08:54:18 |
| 41.119.0.0/18 | 133,590 | 2026-11-13 08:54:18 |
| 41.112.16.0/20 | 133,404 | 2026-11-13 08:54:18 |
| 197.64.96.0/19 | 133,047 | 2026-11-13 08:54:18 |
| 197.66.0.0/19 | 132,991 | 2026-11-13 08:54:18 |
| 197.66.32.0/19 | 132,922 | 2026-11-13 08:54:18 |
| 197.68.64.0/19 | 131,839 | 2026-11-13 08:54:18 |
| 197.66.128.0/19 | 131,719 | 2026-11-13 08:54:18 |
| 197.68.0.0/19 | 131,676 | 2026-11-13 08:54:18 |
| 197.66.160.0/19 | 131,541 | 2026-11-13 08:54:18 |
| 197.68.32.0/19 | 131,522 | 2026-11-13 08:54:18 |
| 41.124.0.0/17 | 131,259 | 2026-11-13 08:54:18 |
| 197.78.128.0/17 | 131,228 | 2026-11-13 08:54:18 |
| 197.69.128.0/19 | 130,798 | 2026-11-13 08:54:18 |
| 197.69.160.0/19 | 130,791 | 2026-11-13 08:54:18 |
| 41.120.0.0/19 | 128,162 | 2026-11-13 08:54:18 |
| 41.117.128.0/17 | 128,147 | 2026-11-13 08:54:18 |
| 41.112.0.0/20 | 128,096 | 2026-11-13 08:54:18 |
| 41.112.64.0/19 | 128,076 | 2026-11-13 08:54:18 |
| 41.112.32.0/20 | 127,922 | 2026-11-13 08:54:18 |
| 197.69.224.0/19 | 127,609 | 2026-11-13 08:54:18 |
| 197.69.192.0/19 | 126,968 | 2026-11-13 08:54:18 |
| 41.117.64.0/19 | 125,787 | 2026-11-13 08:54:18 |
| 41.124.128.0/19 | 123,926 | 2026-11-13 08:54:18 |
| 41.124.160.0/19 | 123,886 | 2026-11-13 08:54:18 |
| 41.119.224.0/19 | 123,384 | 2026-11-13 08:54:18 |
| 41.117.0.0/19 | 123,167 | 2026-11-13 08:54:18 |
| 41.119.192.0/19 | 123,114 | 2026-11-13 08:54:18 |
| 41.117.32.0/19 | 123,069 | 2026-11-13 08:54:18 |
| 41.117.96.0/19 | 122,985 | 2026-11-13 08:54:18 |
Showing top 50 of 132 announced prefixes by sample volume.
Frequently Asked Questions
What is AS12091?
AS12091 is an Autonomous System Number assigned to MTN SA. 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 AS12091 announce?
AS12091 announces 1.25M IPv4 addresses distributed across 36 routed CIDR prefixes. The network is registered in South Africa.
Who operates AS12091?
AS12091 is operated by MTN SA. The organization is based in South Africa. You can view all IP ranges and related ASNs on the organization page.
What country is AS12091 registered in?
AS12091 is registered in South Africa. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
