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AS16171Fulnett Limited

IrelandRegistryRIPE NCC

As of 10th November 2026, AS16171 (Fulnett Limited), a network registered in Ireland with RIPE NCC, originates 9 IPv4 prefixes covering 45.1k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 4,708th-largest of the 80,723 networks we see originating IPv4, and the 11th-largest of 197 in Ireland. It is seen behind 7 upstream networks, most often AS6461 (Zayo Bandwidth) and AS174 (Cogent Communications, LLC), and in front of 1 downstream network. 10% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 80% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

9

IPv6 prefixes

1

IPv4 addresses

45.1k

IPv6 /64s

4.3B

Upstream graph

The networks AS16171 is seen behind, one and two hops out, drawn from real AS paths.

AS16171Toward the internet core
Upstream graph for AS16171: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS16171Fulnett LimitedThis networkAS174Cogent Communicat…AS6461Zayo BandwidthAS6939Hurricane Electri…AS13237euNetworks GmbHAS14537Continent 8 LLCAS151326DCConnect Communi…AS32590Valve CorporationAS1299Arelion (fka. Tel…AS20130Depaul UniversityAS132337AxclusiveAS2914NTT America, Inc.AS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS16171 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

26

adjacent networks

Upstreams
727%
Peers
1869%
Downstreams
14%

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

Upstreams of AS16171
NetworkCountryRelationshipPathsVantage pts
AS6461Zayo BandwidthUSPeer48796
AS174Cogent Communications, LLCUSPeer27066
AS6939Hurricane Electric LLCUSPeer126
AS14537Continent 8 LLCUSPeer92
AS13237euNetworks GmbHDEPeer81
AS39122Blacknight Internet Solutions LimitedIEPeer81
AS20562Open Peering (Broadband Hosting B.V.)NLPeer11

Prefixes

The largest blocks AS16171 originates, widest first.

Largest prefixes originated by AS16171
PrefixAddressesVisibility
77.107.192.0/1816.4k75/76
77.107.192.0/198.2k76/76
77.107.224.0/198.2k75/76
217.75.0.0/204.1k75/76
31.216.232.0/212k75/76
88.151.0.0/212k75/76
217.75.8.0/212k5/76
185.144.124.0/221k75/76
185.146.184.0/221k75/76
2a02:198::/324.3B × /6421/63

Routing health

How AS16171'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

  • Valid10.0%1
  • Invalid0.0%0
  • No ROA90.0%9

Propagation

  • Globally propagated90% of full-feed peers or more80.0%8
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%20.0%2

Prefix sizes

IPv4 — 9 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 11th Oct 2026.

No announcement by AS16171 started or stopped in this period.

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