ASN database

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IP to CIDR calculation tool with subnet info. The reverse, CIDR ranges to IP addresses, is also possible. Last but not least, it includes a tool for refactoring groups of IPs, domain names, and/or other CIDR ranges.

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GeoIP location

199.221.128.0

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Result

199.221.128.0/21

Prefix:

199.221.128.0/21 (2.048 IP's - view in CIDR to IP tool)

Description:

Computer Systems Design Company

Country:

United States

Announced by:

Computer Systems Design Company

AS3364, 4 peers, 5 announced prefixes

See all details on AS3364 - Computer Systems Design Company »

Matching prefixes

Country

ASN

Announced prefix

Description

Size

United States

AS701

199.221.0.0/16

Verizon Business

65.536

United States

AS3364

199.221.128.0/21

Computer Systems Design Company

2.048

Log

000	+000	Parse input (Prefix)
000	+000	Search database for '199.221.128.0/21'
014	+013	2 prefixes found
014	+000	Done

ASN database

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Result

199.221.128.0/21

Matching prefixes

Log

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