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AS3976901A Smart Start LLC

United StatesRegistryARIN

As of 24th October 2026, AS397690 (1A Smart Start LLC), a network registered in the United States with ARIN, originates 2 IPv4 prefixes covering 512 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 48,598th-largest of the 79,642 networks we see originating IPv4, and the 10,388th-largest of 18,487 in the United States. It is seen behind 2 upstream networks, most often AS3356 (Lumen (Level 3)) and AS35985 (One Ring Networks, Inc.). 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

2

IPv6 prefixes

1

IPv4 addresses

512

IPv6 /64s

65.5k

Upstream graph

The networks AS397690 is seen behind, one and two hops out, drawn from real AS paths.

AS397690Toward the internet core
Upstream graph for AS397690: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS3976901A Smart Start LLCThis networkAS3356Lumen (Level 3)AS35985One Ring Networks…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS6461Zayo Bandwidth

Networks observed one and two hops upstream of AS397690 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

6

adjacent networks

Upstreams
233%
Peers
467%
Downstreams
00%

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

Upstreams of AS397690
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer16791
AS35985One Ring Networks, Inc.USPeer4848

Prefixes

The largest blocks AS397690 originates, widest first.

Largest prefixes originated by AS397690
PrefixAddressesVisibility
8.31.199.0/2425676/76
198.178.255.0/2425676/76
2620:9d:e000::/4865.5k × /6463/63

Routing health

How AS397690'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%3

Propagation

  • Globally propagated90% of full-feed peers or more100.0%3
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 24th Sept 2026.

No announcement by AS397690 started or stopped in this period.

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