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AS19901Brightspeed

United StatesRegistryARIN

As of 11th November 2026, AS19901 (Brightspeed), a network registered in the United States with ARIN, originates 1,392 IPv4 prefixes covering 3.2M addresses and 51 IPv6 prefixes. By IPv4 address space that makes it the 193rd-largest of the 80,747 networks we see originating IPv4, and the 51st-largest of 18,752 in the United States. It is seen behind 5 upstream networks, most often AS3356 (Lumen (Level 3)) and AS12129 (123.Net, Inc.). 14% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 90% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

1,392

IPv6 prefixes

51

IPv4 addresses

3.2M

IPv6 /64s

638M

Upstream graph

The networks AS19901 is seen behind, one and two hops out, drawn from real AS paths.

AS19901Toward the internet core
Upstream graph for AS19901: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS19901BrightspeedThis networkAS3356Lumen (Level 3)AS12129123.Net, Inc.AS13335Cloudflare, Inc.AS36086Digital Realty (f…AS49915Megaport Global A…AS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS6461Zayo BandwidthAS6939Hurricane Electri…AS1299Arelion (fka. Tel…AS3257GTT Communication…AS38195Superloop

Networks observed one and two hops upstream of AS19901 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

14

adjacent networks

Upstreams
536%
Peers
964%
Downstreams
00%

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

Upstreams of AS19901
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer96,016138
AS12129123.Net, Inc.USPeer1,066138
AS36086Digital Realty (fka. Telx)USPeer32275
AS13335Cloudflare, Inc.USPeer30476
AS49915Megaport Global AccessGBPeer12875

Prefixes

All 1,443

The largest blocks AS19901 originates, widest first.

Largest prefixes originated by AS19901
PrefixAddressesVisibility
67.6.0.0/1665.5k76/76
71.210.0.0/1665.5k76/76
71.213.0.0/1665.5k76/76
71.217.0.0/1665.5k76/76
71.219.0.0/1665.5k76/76
75.170.0.0/1665.5k76/76
75.173.0.0/1665.5k76/76
97.114.0.0/1665.5k76/76
174.19.0.0/1665.5k76/76
184.100.0.0/1665.5k76/76

Routing health

How AS19901'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

  • Valid13.8%199
  • Invalid0.0%0
  • No ROA86.2%1,244

Propagation

  • Globally propagated90% of full-feed peers or more89.7%1,294
  • Partially propagated40% to 90%<0.1%1
  • Seen by few peersUnder 40%10.3%148

Prefix sizes

IPv4 — 1,392 prefixes

IPv6 — 51 prefixes

  • /3933.6M × /6435.3%18
  • /441M × /6462.7%32
  • /4865.5k × /642.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

165 announced and 52 withdrawn in all; the most recent are shown.

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