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AS21737

SPRINGNET2-NET

SpringNet

Registry

Authoritative registration data

AS number
21737
Name
SPRINGNET2-NET
Organisation
SpringNet
Country
—
RIR
ARIN
Registered
Source:asn:rdap retrieved

IPv4 prefixes

10

IPv6 prefixes

1

Total announced

11

Announced prefixes

Observed in BGP by route collectors, not a registry allocation list

Prefixes announced by AS21737
64.22.224.0/19 IPv4 /19 not checked
66.119.0.0/19 IPv4 /19 not checked
75.98.96.0/20 IPv4 /20 not checked
76.77.128.0/20 IPv4 /20 not checked
198.246.200.0/24 IPv4 /24 not checked
64.22.225.0/24 IPv4 /24 not checked
64.22.249.0/24 IPv4 /24 not checked
64.22.255.0/24 IPv4 /24 not checked
75.98.102.0/24 IPv4 /24 not checked
75.98.103.0/24 IPv4 /24 not checked
2001:49b8::/32 IPv6 /32 not checked

No rows match “”.

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Source:ripestat:announced-prefixes observed

Internet Exchanges

Exchanges where this network has a listed peering LAN connection

Internet Exchange memberships listed for AS21737
Address families
KCIX 100,000 Mbps IPv4 · IPv6

No rows match “”.

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Source:peeringdb retrieved

Exchange membership means the network has a listed connection; it does not prove peering with other members.

Observed adjacencies

Networks seen next to AS21737 in BGP paths by route collectors.

Source:ripestat:asn-neighbours observed

Observed upstreams

3 networks seen before AS21737 in AS paths

Observed upstreams
Families
AS1299 TWELVE99 690 2,221
v4 v6
AS3356 LEVEL3 722 2,079
v4 v6
AS174 COGENT-174 566 1,938
v4

No rows match “”.

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Observed downstreams

7 networks seen after AS21737 in AS paths

Observed downstreams
Families
AS63051 CRITICALHOSTING-USA 349 1,632
v4 v6
AS393977 GSB 237 548
v4
AS33252 BASSPRO-AS 151 364
v4
AS30628 SRC-AUTOMOTIVE-INC 231 274
v4
AS21835 SCARSDALE-SECURITY-SYSTEMS 230 274
v4
AS11826 RISS2 228 273
v4
AS20296 EXPEDIA-ARIN 149 175
v4

No rows match “”.

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Uncertain adjacencies

4 adjacencies that may be an artefact of collector peering

Uncertain adjacencies
Families
AS1003 ANDREWNET 5 16
v4 v6
AS36236 NETACTUATE 5 16
v4 v6
AS34927 iFog-GmbH 2 2
v4 v6
AS200454 TOM-AS 1 1
v6

No rows match “”.

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Note:
These are observed adjacencies derived from BGP path data, not confirmed commercial relationships. A network appearing before another in an AS path does not establish that it is a paying transit customer, a settlement free peer, or anything else contractual. Adjacencies marked uncertain were seen only as direct peers of a route collector, so the collector's own peering may have created them.