AS3356Lumen (Level 3)

United StatesRegistryARINTypeT1

As of 13th October 2026, AS3356 (Lumen (Level 3)), a tier-1 transit network registered in the United States with ARIN, originates 2,619 IPv4 prefixes covering 34.7M addresses and 129 IPv6 prefixes. By IPv4 address space that makes it the 18th-largest of the 79,585 networks we see originating IPv4, and the 11th-largest of 18,443 in the United States. It is seen behind 114 upstream networks, most often AS2914 (NTT America, Inc.) and AS3549 (Lumen (fka. Global Crossing)), and in front of 6,532 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 730 prefixes are also originated by another network.

At a glance

IPv4 prefixes

2,619

IPv6 prefixes

129

IPv4 addresses

34.7M

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

13,233

adjacent networks

Upstreams: 1141%
Peers: 6,58750%
Downstreams: 6,53249%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 114.

Upstreams of AS3356
Network	Country	Relationship	Paths	Vantage pts
AS2914NTT America, Inc.	US	Peer	1,337,686	69
AS3549Lumen (fka. Global Crossing)	US	Peer	1,067,433	3
AS266213PLANETCLICK TELECOMUNICACOES LTDA	BR	Peer	1,002,422	2
AS35280F5 Networks SARL	FR	Peer	831,415	6
AS1299Arelion (fka. Telia Carrier)	SE	Peer	750,692	81
AS1000LINK AMERICAN	US	Peer	572,230	2
AS2152CENIC - CalREN	US	Peer	544,865	1
AS9002RETN Limited	GB	Peer	486,221	42
AS2497Internet Initiative Japan Inc.	JP	Peer	464,767	6
AS3491PCCW Global (HK) Ltd.	HK	Peer	461,646	37

Prefixes

All 2,748

The largest blocks AS3356 originates, widest first.

Largest prefixes originated by AS3356
Prefix	Addresses	Visibility
::/0	18446744T × /64	1/65
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%2,555

Propagation

Globally propagated90% of full-feed peers or more37.6%1,033
Partially propagated40% to 90%0.2%6
Seen by few peersUnder 40%62.2%1,709

Prefix sizes

IPv4 — 2,619 prefixes

IPv6 — 129 prefixes

/2934.4B × /640.8%1
/318.6B × /640.8%1
/324.3B × /647.0%9
/332.1B × /641.6%2
/4016.8M × /640.8%1
/441M × /641.6%2
/4865.5k × /6487.6%113

Recent changes

Announcements that started or stopped since 13th Sept 2026.

Announced216.85.150.192/2612th Oct 2026
Announced4.96.104.96/2712th Oct 2026
Announced66.192.6.0/2512th Oct 2026
Withdrawn113.29.78.0/2412th Oct 2026
Withdrawn192.91.253.0/2412th Oct 2026
Withdrawn2620:9f:12::/4812th Oct 2026
Withdrawn161.199.26.0/246th Oct 2026
Withdrawn2001:13b2:8055::/486th Oct 2026
Withdrawn216.32.152.0/246th Oct 2026
Withdrawn50.58.93.0/246th Oct 2026
Withdrawn66.192.6.0/255th Oct 2026
Announced62.140.5.0/244th Oct 2026

38 announced and 58 withdrawn in all; the most recent are shown.

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