subnet.im

AS16637MTN SA (Bayobab)

South AfricaRegistryAFRINICTypeEyeball

As of 10th November 2026, AS16637 (MTN SA (Bayobab)), an access network registered in South Africa with AFRINIC, originates 223 IPv4 prefixes covering 5.4M addresses and 13 IPv6 prefixes. By IPv4 address space that makes it the 132nd-largest of the 80,723 networks we see originating IPv4, and the largest of 657 in South Africa. It is seen behind 49 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS1299 (Arelion (fka. Telia Carrier)), and in front of 56 downstream networks. 85% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 90% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

223

IPv6 prefixes

13

IPv4 addresses

5.4M

IPv6 /64s

12.9B

Upstream graph

The networks AS16637 is seen behind, one and two hops out, drawn from real AS paths.

AS16637Toward the internet core
Upstream graph for AS16637: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS16637MTN SA (Bayobab)This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS6939Hurricane Electri…AS9002RETN LimitedAS151326DCConnect Communi…AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS20130Depaul UniversityAS132337Axclusive

Networks observed one and two hops upstream of AS16637 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

1,661

adjacent networks

Upstreams
493%
Peers
1,55694%
Downstreams
563%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 49.

Upstreams of AS16637
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer60,945123
AS1299Arelion (fka. Telia Carrier)SEPeer32,341126
AS3356Lumen (Level 3)USPeer23,82171
AS174Cogent Communications, LLCUSPeer7,970118
AS9002RETN LimitedGBPeer3,85415
AS14537Continent 8 LLCUSPeer3,8412
AS3491PCCW Global (HK) Ltd.HKPeer2,4725
AS12956Telxius (Telefonica Global)ESPeer2,37575
AS25091IP-Max SACHPeer2,2345
AS49544i3D.net B.VNLPeer2,2292

Prefixes

All 236

The largest blocks AS16637 originates, widest first.

Largest prefixes originated by AS16637
PrefixAddressesVisibility
41.112.0.0/121M75/76
105.208.0.0/121M75/76
197.64.0.0/121M75/76
105.208.0.0/13524k75/76
105.216.0.0/13524k75/76
105.236.0.0/15131k76/76
196.30.0.0/15131k75/76
41.113.0.0/1665.5k76/76
41.181.0.0/1665.5k76/76
41.195.0.0/1665.5k76/76

Routing health

How AS16637'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

  • Valid85.2%201
  • Invalid0.0%0
  • No ROA14.8%35

Propagation

  • Globally propagated90% of full-feed peers or more90.3%213
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%9.7%23

Prefix sizes

IPv4 — 223 prefixes

IPv6 — 13 prefixes

  • /324.3B × /6423.1%3
  • /49 and longerAggregated76.9%10

Recent changes

Announcements that started or stopped since 11th Oct 2026.

23 announced and 6 withdrawn in all; the most recent are shown.

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