subnet.im

AS3561Lumen (ex. Savvis)

United StatesRegistryARINTypeEyeball

As of 11th November 2026, AS3561 (Lumen (ex. Savvis)), an access network registered in the United States with ARIN, originates 701 IPv4 prefixes covering 7.5M addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 96th-largest of the 80,743 networks we see originating IPv4, and the 29th-largest of 18,754 in the United States. It is seen behind 3 upstream networks, most often AS3356 (Lumen (Level 3)) and AS209 (Lumen (ex. Qwest)), and in front of 45 downstream networks. 34% of its announcements have a valid RPKI ROA; 1 is RPKI-invalid. 96% of its routes reach at least 90% of full-feed peers, and 7 prefixes are also originated by another network.

At a glance

IPv4 prefixes

701

IPv6 prefixes

1

IPv4 addresses

7.5M

IPv6 /64s

262k

Upstream graph

The networks AS3561 is seen behind, one and two hops out, drawn from real AS paths.

AS3561Toward the internet core
Upstream graph for AS3561: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS3561Lumen (ex. Savvis)This networkAS209Lumen (ex. Qwest)AS3356Lumen (Level 3)AS3910Lumen (ex Qwest E…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…

Networks observed one and two hops upstream of AS3561 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

103

adjacent networks

Upstreams
33%
Peers
5553%
Downstreams
4544%

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

Upstreams of AS3561
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer55,777138
AS209Lumen (ex. Qwest)USPeer28476
AS3910Lumen (ex Qwest Europe)USPeer23376

Prefixes

All 702

The largest blocks AS3561 originates, widest first.

Largest prefixes originated by AS3561
PrefixAddressesVisibility
208.144.0.0/13524k75/76
64.240.0.0/14262k76/76
206.100.0.0/14262k76/76
216.32.0.0/14262k76/76
216.88.0.0/14262k76/76
66.100.0.0/15131k76/76
204.70.0.0/15131k76/76
205.138.0.0/15131k76/76
205.218.0.0/15131k76/76
206.26.0.0/15131k76/76

Routing health

How AS3561'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

  • Valid34.3%241
  • Invalid0.1%1
  • No ROA65.5%460

Propagation

  • Globally propagated90% of full-feed peers or more96.3%676
  • Partially propagated40% to 90%0.1%1
  • Seen by few peersUnder 40%3.6%25

Prefix sizes

IPv4 — 701 prefixes

IPv6 — 1 prefixes

  • /46262k × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

71 announced and 4 withdrawn in all; the most recent are shown.

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