subnet.im

AS6621Hughes Network Systems, LLC

United StatesRegistryARINTypeEyeball

As of 26th September 2026, AS6621 (Hughes Network Systems, LLC), an access network registered in the United States with ARIN, originates 371 IPv4 prefixes covering 575k addresses and 267 IPv6 prefixes. By IPv4 address space that makes it the 652nd-largest of the 79,516 networks we see originating IPv4, and the 156th-largest of 18,424 in the United States. It is seen behind 20 upstream networks, most often AS174 (Cogent Communications, LLC) and AS6461 (Zayo Bandwidth), and in front of 6 downstream networks. Over 99% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. Over 99% of its routes reach at least 90% of full-feed peers, and 3 prefixes are also originated by another network.

At a glance

IPv4 prefixes

371

IPv6 prefixes

267

IPv4 addresses

575k

IPv6 /64s

2.5B

Upstream graph

The networks AS6621 is seen behind, one and two hops out, drawn from real AS paths.

AS6621Toward the internet core
Upstream graph for AS6621: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS6621Hughes Network Sy…This networkAS174Cogent Communicat…AS3356Lumen (Level 3)AS6461Zayo BandwidthAS13765Nedelco Inc.AS32098Flō Networks (Tra…AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS3549Lumen (fka. Globa…AS32590Valve CorporationAS2914NTT America, Inc.AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS6621 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

69

adjacent networks

Upstreams
2029%
Peers
4362%
Downstreams
69%

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

Upstreams of AS6621
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer20,846139
AS6461Zayo BandwidthUSPeer18,143145
AS3356Lumen (Level 3)USPeer9,238145
AS13765Nedelco Inc.USPeer5,646143
AS32098Flō Networks (Transtelco Inc.)USPeer1,385145
AS7018AT&T Enterprises, LLCUSPeer1,23630
AS6939Hurricane Electric LLCUSPeer89217
AS13999Mega Cable, S.A. de C.V.MXPeer741145
AS8057Vision Net, Inc.USPeer56344
AS6503Axtel, S.A.B. de C.V.MXPeer31662

Prefixes

All 638

The largest blocks AS6621 originates, widest first.

Largest prefixes originated by AS6621
PrefixAddressesVisibility
66.82.0.0/198.2k81/81
66.82.32.0/198.2k81/81
66.82.64.0/198.2k81/81
66.82.160.0/198.2k81/81
66.82.192.0/198.2k81/81
67.45.160.0/198.2k81/81
67.46.192.0/198.2k81/81
67.47.32.0/198.2k81/81
67.142.0.0/198.2k81/81
67.142.160.0/198.2k81/81

Routing health

How AS6621'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

  • Valid99.7%636
  • Invalid0.0%0
  • No ROA0.3%2

Propagation

  • Globally propagated90% of full-feed peers or more99.5%635
  • Partially propagated40% to 90%0.2%1
  • Seen by few peersUnder 40%0.3%2

Prefix sizes

IPv4 — 371 prefixes

IPv6 — 267 prefixes

  • /37134M × /643.0%8
  • /3933.6M × /643.4%9
  • /4016.8M × /6419.9%53
  • /441M × /6467.8%181
  • /46262k × /640.4%1
  • /47131k × /640.4%1
  • /4865.5k × /645.2%14

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS6621 started or stopped in this period.

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