AS3356Lumen (Level 3)

United StatesRegistryARINTypeT1

As of 26th September 2026, AS3356 (Lumen (Level 3)), a tier-1 transit network registered in the United States with ARIN, originates 2,624 IPv4 prefixes covering 34.6M addresses and 132 IPv6 prefixes. By IPv4 address space that makes it the 18th-largest of the 79,480 networks we see originating IPv4, and the 11th-largest of 18,421 in the United States. It is seen behind 112 upstream networks, most often AS2914 (NTT America, Inc.) and AS3549 (Lumen (fka. Global Crossing)), and in front of 6,547 downstream networks. 7% of its announcements have a valid RPKI ROA; 4 are RPKI-invalid. 38% of its routes reach at least 90% of full-feed peers, and 13 prefixes are also originated by another network.

At a glance

IPv4 prefixes

2,624

IPv6 prefixes

132

IPv4 addresses

34.6M

IPv6 /64s

85.9B

Upstream graph

The networks AS3356 is seen behind, one and two hops out, drawn from real AS paths.

AS3356Toward the internet core

Networks observed one and two hops upstream of AS3356 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

13,299

adjacent networks

Upstreams: 1121%
Peers: 6,64050%
Downstreams: 6,54749%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 112.

Upstreams of AS3356
Network	Country	Relationship	Paths	Vantage pts
AS2914NTT America, Inc.	US	Peer	1,290,131	70
AS3549Lumen (fka. Global Crossing)	US	Peer	1,064,484	3
AS266213PLANETCLICK TELECOMUNICACOES LTDA	BR	Peer	999,869	2
AS35280F5 Networks SARL	FR	Peer	829,290	6
AS1299Arelion (fka. Telia Carrier)	SE	Peer	667,296	70
AS1000LINK AMERICAN	US	Peer	590,290	2
AS2152CENIC - CalREN	US	Peer	546,560	1
AS9002RETN Limited	GB	Peer	483,223	42
AS3491PCCW Global (HK) Ltd.	HK	Peer	467,877	36
AS2497Internet Initiative Japan Inc.	JP	Peer	463,255	6

Prefixes

All 2,756

The largest blocks AS3356 originates, widest first.

Largest prefixes originated by AS3356
Prefix	Addresses	Visibility
::/0	18446744T × /64	1/64
4.0.0.0/9	8.4M	79/81
8.0.0.0/9	8.4M	80/81
8.0.0.0/12	1M	80/81
8.16.0.0/12	1M	80/81
8.32.0.0/12	1M	80/81
8.48.0.0/12	1M	80/81
8.64.0.0/12	1M	80/81
8.192.0.0/12	1M	80/81
8.240.0.0/12	1M	80/81

Routing health

How AS3356'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

Valid6.9%189
Invalid0.1%4
No ROA93.0%2,563

Propagation

Globally propagated90% of full-feed peers or more37.7%1,039
Partially propagated40% to 90%0.1%4
Seen by few peersUnder 40%62.2%1,713

Prefix sizes

IPv4 — 2,624 prefixes

IPv6 — 132 prefixes

/2934.4B × /640.8%1
/318.6B × /640.8%1
/324.3B × /646.8%9
/332.1B × /641.5%2
/4016.8M × /640.8%1
/441M × /641.5%2
/4865.5k × /6487.9%116

Recent changes

Announcements that started or stopped since 27th Aug 2026.

Withdrawn205.140.220.0/2325th Sept 2026
Withdrawn205.140.226.0/2425th Sept 2026
Announced65.153.51.0/2425th Sept 2026
Withdrawn2001:13b2:bc1d::/4825th Sept 2026
Withdrawn64.154.180.8/2925th Sept 2026
Withdrawn65.153.51.0/2425th Sept 2026
Withdrawn65.124.182.0/2424th Sept 2026
Announced4.96.104.96/2724th Sept 2026
Announced8.15.209.0/2424th Sept 2026
Announced8.28.160.0/2224th Sept 2026
Announced8.45.136.0/2424th Sept 2026
Withdrawn2001:13b2:801c::/4824th Sept 2026

28 announced and 40 withdrawn in all; the most recent are shown.

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