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AS20751AZISTA GmbH

AustriaRegistryRIPE NCC

As of 11th November 2026, AS20751 (AZISTA GmbH), a network registered in Austria with RIPE NCC, originates 9 IPv4 prefixes covering 13.1k addresses. By IPv4 address space that makes it the 9,284th-largest of the 80,743 networks we see originating IPv4, and the 71st-largest of 624 in Austria. It is seen behind 9 upstream networks, most often AS1764 (Next Layer Telecommunications) and AS24953 (NETPLANET GmbH), and in front of 4 downstream networks. 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

9

IPv6 prefixes

0

IPv4 addresses

13.1k

IPv6 /64s

0

Upstream graph

The networks AS20751 is seen behind, one and two hops out, drawn from real AS paths.

AS20751Toward the internet core
Upstream graph for AS20751: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS20751AZISTA GmbHThis networkAS1764Next Layer Teleco…AS3303Swisscom (Schweiz…AS6939Hurricane Electri…AS13030Init7 (Switzerlan…AS24953NETPLANET GmbHAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS20130Depaul UniversityAS132337AxclusiveAS56662Marcin GondekAS8220COLT

Networks observed one and two hops upstream of AS20751 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

56

adjacent networks

Upstreams
916%
Peers
4377%
Downstreams
47%

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

Upstreams of AS20751
NetworkCountryRelationshipPathsVantage pts
AS1764Next Layer TelecommunicationsATPeer89555
AS24953NETPLANET GmbHATPeer34323
AS6939Hurricane Electric LLCUSPeer975
AS13030Init7 (Switzerland) Ltd.CHPeer442
AS132337AxclusiveSGAdjacent221
AS49544i3D.net B.VNLPeer221
AS24940Hetzner Online GmbHDEPeer221
AS3303Swisscom (Schweiz) AGCHPeer221
AS13237euNetworks GmbHDEPeer221

Prefixes

The largest blocks AS20751 originates, widest first.

Largest prefixes originated by AS20751
PrefixAddressesVisibility
83.216.208.0/204.1k76/76
80.64.128.0/212k76/76
83.216.208.0/212k76/76
80.64.136.0/221k76/76
83.216.216.0/221k76/76
83.216.220.0/221k76/76
185.136.212.0/221k76/76
195.62.26.0/2351276/76
78.40.213.0/2425676/76

Routing health

How AS20751'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%9
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%9
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 9 prefixes

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS20751 started or stopped in this period.

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