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AS12091MTN SA

South AfricaRegistryAFRINIC

As of 10th November 2026, AS12091 (MTN SA), a network registered in South Africa with AFRINIC, originates 131 IPv4 prefixes covering 1.5M addresses. By IPv4 address space that makes it the 352nd-largest of the 80,723 networks we see originating IPv4, and the 8th-largest of 657 in South Africa. It is seen behind 1 upstream network, most often AS16637 (MTN SA (Bayobab)). 95% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 98% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

131

IPv6 prefixes

0

IPv4 addresses

1.5M

IPv6 /64s

0

Upstream graph

The networks AS12091 is seen behind, one and two hops out, drawn from real AS paths.

AS12091Toward the internet core
Upstream graph for AS12091: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS12091MTN SAThis networkAS16637MTN SA (Bayobab)AS1299Arelion (fka. Tel…AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS12091 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS12091
NetworkCountryRelationshipPathsVantage pts
AS16637MTN SA (Bayobab)ZAPeer9,73976

Prefixes

All 131

The largest blocks AS12091 originates, widest first.

Largest prefixes originated by AS12091
PrefixAddressesVisibility
41.113.0.0/1732.8k76/76
41.113.128.0/1732.8k76/76
41.114.0.0/1732.8k76/76
41.114.128.0/1732.8k76/76
41.115.0.0/1732.8k76/76
41.115.128.0/1732.8k16/76
41.116.0.0/1732.8k76/76
41.116.128.0/1732.8k76/76
41.117.0.0/1732.8k76/76
41.117.128.0/1732.8k76/76

Routing health

How AS12091's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid94.7%124
  • Invalid0.0%0
  • No ROA5.3%7

Propagation

  • Globally propagated90% of full-feed peers or more97.7%128
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%2.3%3

Prefix sizes

IPv4 — 131 prefixes

Recent changes

Announcements that started or stopped since 11th Oct 2026.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.