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Internet tools
DNS lookup
DNS propagation check
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HTTP/S request tool
TLS/SSL certificate check
beta
E-mail DNSBL blacklist check
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What is my IPv4 and IPv6?
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Color contrast checker
Color picker
Lorem ipsum generator
URL encode/decode
HTML encode/decode
BASE64 encode/decode
Hash calculator (CRC64 - MD5 - SHA - RIPEMD)
Misc tools
Password generator
World map, day/night + local time
beta
Internet tools
DNS lookup
DNS propagation check
Port scan + probeing
WHOIS / RDAP lookup
HTTP/S request tool
TLS/SSL certificate check
beta
E-mail DNSBL blacklist check
Reverse DNS
CIDR calculator
beta
ASN database lookup
beta
What is my IPv4 and IPv6?
GeoIP location
QR code generator
Dev tools
Color contrast checker
Color picker
Lorem ipsum generator
URL encode/decode
HTML encode/decode
BASE64 encode/decode
Hash calculator (CRC64 - MD5 - SHA - RIPEMD)
Misc tools
Password generator
World map, day/night + local time
beta
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ASN database
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DNS lookup
DNS lookup / nslookup / DIG of DNS records. An online tool for DNS lookups. By default recursive lookups querying the authoritative name servers. Lookups on specific DNS resolvers are also possible. Additionally, it will look up secondary records and output a full log of what was done on a technical level.
WHOIS / RDAP lookup
81.2.128.0
Reverse DNS
81.2.128.0
CIDR calculator
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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
81.2.128.0
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Result
81.2.128.0/18
Prefix:
81.2.128.0/18
(
16.384 IP's - view in CIDR to IP tool
)
Description:
C.C.D. Cogent Communications Deutschland GmbH
Country:
Germany
Announced by:
Cogent Communications
https://www.cogentco.com/
AS174, 6.785 peers, 1.463 announced prefixes
See all details on AS174 - Cogent Communications »
Matching prefixes
Country
ASN
Announced prefix
Description
Size
Germany
AS174
81.2.128.0/18
C.C.D. Cogent Communications Deutschland GmbH
16.384
Germany
AS19970
81.2.128.0/24
CarrierDomain Inc
256
Italy
AS203591
81.2.132.0/22
TECNO GENERAL S.R.L
1.024
Britain (UK)
AS35437
81.2.136.0/22
Zone Telecommunications Ltd t/a Zone Broadband
1.024
Britain (UK)
AS204316
81.2.140.0/24
LINK BROADBAND LIMITED
256
Britain (UK)
AS204316
81.2.141.0/24
LINK BROADBAND LIMITED
256
Israel
AS208905
81.2.144.0/22
Tamares Telecom
1.024
Belgium
AS201042
81.2.148.0/24
Telecom Luxembourg International S.A.
256
Britain (UK)
AS48945
81.2.152.0/21
Independent Fibre Networks
2.048
Britain (UK)
AS48945
81.2.160.0/21
Independent Fibre Networks
2.048
Britain (UK)
AS48945
81.2.168.0/21
Independent Fibre Networks
2.048
Britain (UK)
AS48945
81.2.176.0/21
Independent Fibre Networks
2.048
Germany
AS209784
81.2.187.0/24
WIFISAX GmbH
256
Germany
AS205520
81.2.190.0/24
XTB-COGENT
256
Greece
AS200736
81.2.191.0/24
MEDIANET INVEST M.I.K.E
256
- - show more (+4 entries) - -
- - show less (-4 entries) - -
Log
000
+000
Parse input (Prefix)
000
+000
Search database for '81.2.128.0/18'
007
+007
15 prefixes found
007
+000
Done