subnet.im

AS51043Aspire Technology Solutions Ltd

United KingdomRegistryRIPE NCCTypeEyeball

As of 10th November 2026, AS51043 (Aspire Technology Solutions Ltd), an access network registered in the United Kingdom with RIPE NCC, originates 21 IPv4 prefixes covering 47.6k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 4,622nd-largest of the 80,723 networks we see originating IPv4, and the 109th-largest of 2,122 in the United Kingdom. It is seen behind 35 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS2914 (NTT America, Inc.), and in front of 8 downstream networks. 73% 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

21

IPv6 prefixes

1

IPv4 addresses

47.6k

IPv6 /64s

4.3B

Upstream graph

The networks AS51043 is seen behind, one and two hops out, drawn from real AS paths.

AS51043Toward the internet core
Upstream graph for AS51043: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS51043Aspire Technology…This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS6939Hurricane Electri…AS25091IP-Max SAAS151326DCConnect Communi…AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS49544i3D.net B.VAS215859Hetzner Cloud - S…AS20130Depaul UniversityAS132337Axclusive

Networks observed one and two hops upstream of AS51043 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

172

adjacent networks

Upstreams
3520%
Peers
12975%
Downstreams
85%

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

Upstreams of AS51043
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer77641
AS2914NTT America, Inc.USPeer74543
AS174Cogent Communications, LLCUSPeer25120
AS6939Hurricane Electric LLCUSPeer916
AS25091IP-Max SACHPeer784
AS18106Viewqwest Pte LtdSGPeer642
AS14537Continent 8 LLCUSPeer463
AS34549meerfarbig GmbH & Co. KGDEPeer463
AS49544i3D.net B.VNLPeer392
AS58511Swoop (Anycast Global Backbone)AUPeer392

Prefixes

The largest blocks AS51043 originates, widest first.

Largest prefixes originated by AS51043
PrefixAddressesVisibility
159.242.64.0/1816.4k76/76
83.98.32.0/198.2k76/76
148.253.160.0/198.2k76/76
194.238.80.0/204.1k76/76
5.22.136.0/212k76/76
109.207.16.0/212k76/76
178.23.128.0/212k76/76
185.59.180.0/221k76/76
212.47.86.0/2351276/76
45.88.98.0/2425676/76

Routing health

How AS51043'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

  • Valid72.7%16
  • Invalid0.0%0
  • No ROA27.3%6

Propagation

  • Globally propagated90% of full-feed peers or more100.0%22
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 21 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 11th Oct 2026.

No announcement by AS51043 started or stopped in this period.

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