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AS201525HZ Hosting Ltd

BulgariaRegistryRIPE NCCTypeContent

As of 11th November 2026, AS201525 (HZ Hosting Ltd), a content network registered in Bulgaria with RIPE NCC, originates 8 IPv4 prefixes covering 2.6k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 23,460th-largest of the 80,747 networks we see originating IPv4, and the 148th-largest of 678 in Bulgaria. It is seen behind 2 upstream networks, most often AS3356 (Lumen (Level 3)) and AS174 (Cogent Communications, LLC). 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

8

IPv6 prefixes

2

IPv4 addresses

2.6k

IPv6 /64s

131k

Upstream graph

The networks AS201525 is seen behind, one and two hops out, drawn from real AS paths.

AS201525Toward the internet core
Upstream graph for AS201525: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS201525HZ Hosting LtdThis networkAS174Cogent Communicat…AS3356Lumen (Level 3)AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…

Networks observed one and two hops upstream of AS201525 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

5

adjacent networks

Upstreams
240%
Peers
360%
Downstreams
00%

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

Upstreams of AS201525
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer45485
AS174Cogent Communications, LLCUSPeer26852

Prefixes

The largest blocks AS201525 originates, widest first.

Largest prefixes originated by AS201525
PrefixAddressesVisibility
5.149.252.0/2351275/76
79.141.166.0/2351275/76
45.38.118.0/2425675/76
45.39.120.0/2425675/76
104.252.179.0/2425675/76
104.252.193.0/2425675/76
104.253.210.0/2425675/76
104.253.212.0/2425675/76
2a01:8640:3::/4865.5k × /6461/63
2a01:8640:19::/4865.5k × /6461/63

Routing health

How AS201525'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%10
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%10
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 8 prefixes

IPv6 — 2 prefixes

  • /4865.5k × /64100.0%2

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS201525 started or stopped in this period.

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