subnet.im

AS3549Lumen (fka. Global Crossing)

United StatesRegistryARINTypeCarrier

As of 10th November 2026, AS3549 (Lumen (fka. Global Crossing)), a transit carrier registered in the United States with ARIN, originates 1,520 IPv4 prefixes covering 5.9M addresses and 25 IPv6 prefixes. By IPv4 address space that makes it the 120th-largest of the 80,723 networks we see originating IPv4, and the 37th-largest of 18,750 in the United States. It is seen behind 5 upstream networks, most often AS3356 (Lumen (Level 3)) and AS4775 (Globe Telecoms), and in front of 296 downstream networks. Under 1% of its announcements have a valid RPKI ROA; 121 are RPKI-invalid. 41% of its routes reach at least 90% of full-feed peers, and 725 prefixes are also originated by another network.

At a glance

IPv4 prefixes

1,520

IPv6 prefixes

25

IPv4 addresses

5.9M

IPv6 /64s

65.5B

Upstream graph

The networks AS3549 is seen behind, one and two hops out, drawn from real AS paths.

AS3549Toward the internet core
Upstream graph for AS3549: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS3549Lumen (fka. Globa…This networkAS3356Lumen (Level 3)AS4775Globe TelecomsAS7195EdgeUnoAS22284U.S. Department o…AS47065USC / UFMG PEERIN…AS2914NTT America, Inc.AS1299Arelion (fka. Tel…AS32590Valve CorporationAS6939Hurricane Electri…AS8047GENERAL COMMUNICA…AS20473The Constant Comp…

Networks observed one and two hops upstream of AS3549 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

593

adjacent networks

Upstreams
51%
Peers
29249%
Downstreams
29650%

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

Upstreams of AS3549
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer91,856138
AS4775Globe TelecomsPHAdjacent12,2391
AS22284U.S. Department of the InteriorUSPeer2,51774
AS7195EdgeUnoCOPeer2,3442
AS47065USC / UFMG PEERING Research TestbedUSAdjacent1818

Prefixes

All 1,545

The largest blocks AS3549 originates, widest first.

Largest prefixes originated by AS3549
PrefixAddressesVisibility
35.248.0.0/14262k76/76
64.212.0.0/14262k76/76
66.192.0.0/14262k76/76
50.58.0.0/15131k76/76
64.128.0.0/15131k76/76
64.212.0.0/15131k76/76
67.16.0.0/15131k76/76
67.74.0.0/15131k76/76
74.202.0.0/15131k76/76
173.226.0.0/15131k76/76

Routing health

How AS3549'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

  • Valid0.2%3
  • Invalid7.8%121
  • No ROA92.0%1,421

Propagation

  • Globally propagated90% of full-feed peers or more41.4%639
  • Partially propagated40% to 90%<0.1%1
  • Seen by few peersUnder 40%58.6%905

Prefix sizes

IPv4 — 1,520 prefixes

IPv6 — 25 prefixes

  • /2934.4B × /644.0%1
  • /318.6B × /648.0%2
  • /324.3B × /6412.0%3
  • /341.1B × /644.0%1
  • /441M × /644.0%1
  • /4865.5k × /6468.0%17

Recent changes

Announcements that started or stopped since 11th Oct 2026.

796 announced and 798 withdrawn in all; the most recent are shown.

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