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AS27281Quantcast Corporation

United StatesRegistryARIN

As of 11th November 2026, AS27281 (Quantcast Corporation), a network registered in the United States with ARIN, originates 17 IPv4 prefixes covering 4.4k addresses and 11 IPv6 prefixes. By IPv4 address space that makes it the 16,903rd-largest of the 80,747 networks we see originating IPv4, and the 4,723rd-largest of 18,752 in the United States. It is seen behind 47 upstream networks, most often AS6461 (Zayo Bandwidth) and AS174 (Cogent Communications, LLC). 61% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 46% of its routes reach at least 90% of full-feed peers, and 15 prefixes are also originated by another network.

At a glance

IPv4 prefixes

17

IPv6 prefixes

11

IPv4 addresses

4.4k

IPv6 /64s

721k

Upstream graph

The networks AS27281 is seen behind, one and two hops out, drawn from real AS paths.

AS27281Toward the internet core
Upstream graph for AS27281: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS27281Quantcast Corpora…This networkAS174Cogent Communicat…AS3356Lumen (Level 3)AS6461Zayo BandwidthAS6939Hurricane Electri…AS8220COLTAS151326DCConnect Communi…AS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS1299Arelion (fka. Tel…AS32590Valve CorporationAS20130Depaul UniversityAS132337Axclusive

Networks observed one and two hops upstream of AS27281 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

234

adjacent networks

Upstreams
4720%
Peers
18780%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 47.

Upstreams of AS27281
NetworkCountryRelationshipPathsVantage pts
AS6461Zayo BandwidthUSPeer37877
AS174Cogent Communications, LLCUSPeer19170
AS3356Lumen (Level 3)USPeer132114
AS8220COLTGBPeer11962
AS6939Hurricane Electric LLCUSPeer8921
AS24482SG.GSSGPeer164
AS49544i3D.net B.VNLPeer134
AS58511Swoop (Anycast Global Backbone)AUPeer112
AS7713PT Telkom Indonesia TbkIDPeer75
AS14537Continent 8 LLCUSPeer73

Prefixes

All 28

The largest blocks AS27281 originates, widest first.

Largest prefixes originated by AS27281
PrefixAddressesVisibility
91.228.72.0/242566/76
91.228.74.0/242566/76
103.229.8.0/2425615/76
103.229.9.0/2425615/76
103.229.10.0/2425615/76
103.229.11.0/2425676/76
192.184.67.0/2425616/76
192.184.68.0/2425617/76
192.184.69.0/2425616/76
192.184.70.0/2425616/76

Routing health

How AS27281'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

  • Valid60.7%17
  • Invalid0.0%0
  • No ROA39.3%11

Propagation

  • Globally propagated90% of full-feed peers or more46.4%13
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%53.6%15

Prefix sizes

IPv4 — 17 prefixes

IPv6 — 11 prefixes

  • /4865.5k × /64100.0%11

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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