subnet.im

AS16637MTN SA (Bayobab)

South AfricaRegistryAFRINICTypeEyeball

As of 26th September 2026, AS16637 (MTN SA (Bayobab)), an access network registered in South Africa with AFRINIC, originates 209 IPv4 prefixes covering 5.4M addresses and 13 IPv6 prefixes. By IPv4 address space that makes it the 130th-largest of the 79,480 networks we see originating IPv4, and the largest of 653 in South Africa. It is seen behind 55 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS1299 (Arelion (fka. Telia Carrier)), and in front of 55 downstream networks. 84% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 95% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

209

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…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS18106Viewqwest Pte LtdAS20130Depaul University

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

1,677

adjacent networks

Upstreams
553%
Peers
1,56793%
Downstreams
553%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 55.

Upstreams of AS16637
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer59,752140
AS1299Arelion (fka. Telia Carrier)SEPeer29,352121
AS3356Lumen (Level 3)USPeer24,34177
AS174Cogent Communications, LLCUSPeer10,634122
AS9002RETN LimitedGBPeer4,49617
AS14537Continent 8 LLCUSPeer3,8004
AS12956Telxius (Telefonica Global)ESPeer2,32878
AS25091IP-Max SACHPeer2,3075
AS49544i3D.net B.VNLPeer2,0952
AS3741Dimension DataZAPeer2,0281

Prefixes

All 222

The largest blocks AS16637 originates, widest first.

Largest prefixes originated by AS16637
PrefixAddressesVisibility
41.112.0.0/121M80/81
105.208.0.0/121M80/81
197.64.0.0/121M80/81
105.208.0.0/13524k80/81
105.216.0.0/13524k80/81
105.236.0.0/15131k81/81
196.30.0.0/15131k80/81
41.113.0.0/1665.5k81/81
41.181.0.0/1665.5k81/81
41.195.0.0/1665.5k81/81

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

  • Valid84.2%187
  • Invalid0.0%0
  • No ROA15.8%35

Propagation

  • Globally propagated90% of full-feed peers or more94.6%210
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%5.4%12

Prefix sizes

IPv4 — 209 prefixes

IPv6 — 13 prefixes

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

Recent changes

Announcements that started or stopped since 27th Aug 2026.

36 announced and 36 withdrawn in all; the most recent are shown.

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