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AS12213Centersquare

United StatesRegistryARIN

As of 10th November 2026, AS12213 (Centersquare), a network registered in the United States with ARIN, originates 37 IPv4 prefixes covering 41.2k addresses and 15 IPv6 prefixes. By IPv4 address space that makes it the 4,907th-largest of the 80,733 networks we see originating IPv4, and the 1,719th-largest of 18,751 in the United States. It is seen behind 9 upstream networks, most often AS3356 (Lumen (Level 3)) and AS6461 (Zayo Bandwidth), and in front of 36 downstream networks. 92% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 98% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

37

IPv6 prefixes

15

IPv4 addresses

41.2k

IPv6 /64s

252M

Upstream graph

The networks AS12213 is seen behind, one and two hops out, drawn from real AS paths.

AS12213Toward the internet core
Upstream graph for AS12213: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS12213CentersquareThis networkAS2686AT&T Enterprises,…AS3257GTT Communication…AS3356Lumen (Level 3)AS6461Zayo BandwidthAS7018AT&T Enterprises,…AS6453TATA Communicatio…AS6667Elisa OyjAS398465Rackdog LLCAS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS32590Valve CorporationAS1299Arelion (fka. Tel…

Networks observed one and two hops upstream of AS12213 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

97

adjacent networks

Upstreams
99%
Peers
5254%
Downstreams
3637%

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

Upstreams of AS12213
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer3,932110
AS6461Zayo BandwidthUSPeer3,586108
AS7018AT&T Enterprises, LLCUSPeer3839
AS2686AT&T Enterprises, LLCUSPeer34539
AS3257GTT Communications Inc.USPeer31975
AS49915Megaport Global AccessGBPeer8327
AS6939Hurricane Electric LLCUSPeer4113
AS25091IP-Max SACHPeer135
AS49544i3D.net B.VNLPeer122

Prefixes

All 52

The largest blocks AS12213 originates, widest first.

Largest prefixes originated by AS12213
PrefixAddressesVisibility
131.226.192.0/212k76/76
131.226.200.0/212k76/76
131.226.208.0/212k76/76
131.226.216.0/212k76/76
131.226.232.0/212k76/76
149.137.192.0/212k76/76
149.137.200.0/212k76/76
208.67.48.0/212k76/76
24.170.128.0/221k76/76
24.170.132.0/221k76/76

Routing health

How AS12213'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

  • Valid92.3%48
  • Invalid0.0%0
  • No ROA7.7%4

Propagation

  • Globally propagated90% of full-feed peers or more98.1%51
  • Partially propagated40% to 90%1.9%1
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 37 prefixes

IPv6 — 15 prefixes

  • /4016.8M × /64100.0%15

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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