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AS48181Prolan Ltd.

BulgariaRegistryRIPE NCCTypeEyeball

As of 27th September 2026, AS48181 (Prolan Ltd.), an access network registered in Bulgaria with RIPE NCC, originates 5 IPv4 prefixes covering 4.6k addresses. By IPv4 address space that makes it the 16,155th-largest of the 79,523 networks we see originating IPv4, and the 105th-largest of 669 in Bulgaria. It is seen behind 2 upstream networks, most often AS57344 (Telehouse EAD) and AS42555 (OPTICCOM- BULGARIA Ltd.). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

5

IPv6 prefixes

0

IPv4 addresses

4.6k

IPv6 /64s

0

Upstream graph

The networks AS48181 is seen behind, one and two hops out, drawn from real AS paths.

AS48181Toward the internet core
Upstream graph for AS48181: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS48181Prolan Ltd.This networkAS42555OPTICCOM- BULGARI…AS57344Telehouse EADAS174Cogent Communicat…AS6461Zayo BandwidthAS2914NTT America, Inc.AS6453TATA Communicatio…

Networks observed one and two hops upstream of AS48181 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

4

adjacent networks

Upstreams
250%
Peers
250%
Downstreams
00%

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

Upstreams of AS48181
NetworkCountryRelationshipPathsVantage pts
AS57344Telehouse EADBGPeer40481
AS42555OPTICCOM- BULGARIA Ltd.BGPeer11

Prefixes

The largest blocks AS48181 originates, widest first.

Largest prefixes originated by AS48181
PrefixAddressesVisibility
151.237.48.0/212k81/81
2.56.52.0/221k81/81
45.154.76.0/221k81/81
87.120.245.0/2425681/81
91.92.27.0/2425681/81

Routing health

How AS48181'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

  • Valid100.0%5
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%5
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 5 prefixes

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS48181 started or stopped in this period.

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