subnet.im

AS3561Lumen (ex. Savvis)

United StatesRegistryARINTypeEyeball

As of 27th September 2026, AS3561 (Lumen (ex. Savvis)), an access network registered in the United States with ARIN, originates 614 IPv4 prefixes covering 7.4M addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 95th-largest of the 79,525 networks we see originating IPv4, and the 28th-largest of 18,428 in the United States. It is seen behind 4 upstream networks, most often AS3356 (Lumen (Level 3)) and AS209 (Lumen (ex. Qwest)), and in front of 41 downstream networks. 27% 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 7 prefixes are also originated by another network.

At a glance

IPv4 prefixes

614

IPv6 prefixes

1

IPv4 addresses

7.4M

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: 6 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…AS7991CenturyLink Commu…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

100

adjacent networks

Upstreams
44%
Peers
5555%
Downstreams
4141%

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

Upstreams of AS3561
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer54,222145
AS209Lumen (ex. Qwest)USPeer30481
AS3910Lumen (ex Qwest Europe)USPeer24881
AS7991CenturyLink Communications, LLCUSPeer54

Prefixes

All 615

The largest blocks AS3561 originates, widest first.

Largest prefixes originated by AS3561
PrefixAddressesVisibility
208.144.0.0/13524k80/81
64.240.0.0/14262k81/81
206.100.0.0/14262k81/81
216.32.0.0/14262k81/81
216.88.0.0/14262k81/81
66.100.0.0/15131k81/81
204.70.0.0/15131k81/81
205.138.0.0/15131k81/81
205.218.0.0/15131k81/81
206.26.0.0/15131k81/81

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

  • Valid27.3%168
  • Invalid0.0%0
  • No ROA72.7%447

Propagation

  • Globally propagated90% of full-feed peers or more99.7%613
  • Partially propagated40% to 90%0.2%1
  • Seen by few peersUnder 40%0.2%1

Prefix sizes

IPv4 — 614 prefixes

IPv6 — 1 prefixes

  • /46262k × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

13 announced and 17 withdrawn in all; the most recent are shown.

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