subnet.im

AS20836CDLAN SpA

ItalyRegistryRIPE NCC

As of 27th September 2026, AS20836 (CDLAN SpA), a network registered in Italy with RIPE NCC, originates 16 IPv4 prefixes covering 26.6k addresses and 5 IPv6 prefixes. By IPv4 address space that makes it the 6,021st-largest of the 79,525 networks we see originating IPv4, and the 70th-largest of 1,075 in Italy. It is seen behind 19 upstream networks, most often AS3356 (Lumen (Level 3)) and AS6762 (Telecom Italia Sparkle (Seabone)), and in front of 10 downstream networks. 62% of its announcements have 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

16

IPv6 prefixes

5

IPv4 addresses

26.6k

IPv6 /64s

21.5B

Upstream graph

The networks AS20836 is seen behind, one and two hops out, drawn from real AS paths.

AS20836Toward the internet core
Upstream graph for AS20836: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS20836CDLAN SpAThis networkAS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS6762Telecom Italia Sp…AS6939Hurricane Electri…AS13030Init7 (Switzerlan…AS8888xTom Pty LtdAS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS52075Wifirst S.A.S.AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS56662Marcin Gondek

Networks observed one and two hops upstream of AS20836 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

103

adjacent networks

Upstreams
1918%
Peers
7472%
Downstreams
1010%

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

Upstreams of AS20836
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer2,01495
AS6762Telecom Italia Sparkle (Seabone)ITPeer46552
AS1299Arelion (fka. Telia Carrier)SEPeer40638
AS6939Hurricane Electric LLCUSPeer19620
AS13030Init7 (Switzerland) Ltd.CHPeer1105
AS49544i3D.net B.VNLPeer512
AS3303Swisscom (Schweiz) AGCHPeer451
AS24482SG.GSSGPeer452
AS132337AxclusiveSGPeer382
AS13237euNetworks GmbHDEPeer381

Prefixes

The largest blocks AS20836 originates, widest first.

Largest prefixes originated by AS20836
PrefixAddressesVisibility
95.157.64.0/198.2k81/81
95.157.96.0/198.2k81/81
217.171.32.0/204.1k81/81
178.249.184.0/212k81/81
185.47.228.0/221k81/81
185.164.176.0/2351281/81
5.253.198.0/2425681/81
37.220.41.0/2425681/81
37.220.42.0/2425681/81
91.142.143.0/2425681/81

Routing health

How AS20836'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

  • Valid61.9%13
  • Invalid0.0%0
  • No ROA38.1%8

Propagation

  • Globally propagated90% of full-feed peers or more100.0%21
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 16 prefixes

IPv6 — 5 prefixes

  • /324.3B × /64100.0%5

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS20836 started or stopped in this period.

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