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AS1321Verizon Business

United StatesRegistryARIN

As of 29th September 2026, AS1321 (Verizon Business), a network registered in the United States with ARIN, originates 21 IPv4 prefixes covering 6.1k addresses and 10 IPv6 prefixes. By IPv4 address space that makes it the 13,929th-largest of the 79,607 networks we see originating IPv4, and the 4,048th-largest of 18,442 in the United States. It is seen behind 4 upstream networks, most often AS701 (Verizon Business) and AS702 (Verizon Business - EMEA), and in front of 11 downstream networks. None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

21

IPv6 prefixes

10

IPv4 addresses

6.1k

IPv6 /64s

655k

Upstream graph

The networks AS1321 is seen behind, one and two hops out, drawn from real AS paths.

AS1321Toward the internet core
Upstream graph for AS1321: 7 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS1321Verizon BusinessThis networkAS701Verizon BusinessAS702Verizon Business …AS703Verizon Business …AS1339Verizon BusinessAS3356Lumen (Level 3)AS1299Arelion (fka. Tel…AS174Cogent Communicat…

Networks observed one and two hops upstream of AS1321 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

31

adjacent networks

Upstreams
413%
Peers
1652%
Downstreams
1135%

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

Upstreams of AS1321
NetworkCountryRelationshipPathsVantage pts
AS701Verizon BusinessUSPeer3,763147
AS702Verizon Business - EMEAUSPeer3,513147
AS703Verizon Business - APACUSPeer2,227147
AS1339Verizon BusinessUSPeer147147

Prefixes

All 31

The largest blocks AS1321 originates, widest first.

Largest prefixes originated by AS1321
PrefixAddressesVisibility
152.196.4.0/221k82/82
152.196.4.0/2425682/82
152.196.8.0/2425682/82
152.196.10.0/2425682/82
152.196.12.0/2425682/82
152.196.14.0/2425682/82
152.196.16.0/2425682/82
152.196.18.0/2425682/82
152.196.20.0/2425682/82
152.196.22.0/2425682/82

Routing health

How AS1321'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

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%31

Propagation

  • Globally propagated90% of full-feed peers or more100.0%31
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 21 prefixes

IPv6 — 10 prefixes

  • /4865.5k × /64100.0%10

Recent changes

Announcements that started or stopped since 30th Aug 2026.

No announcement by AS1321 started or stopped in this period.

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