iamroot.tech
Toggle navigation
Internet tools
DNS lookup
DNS propagation check
Port scan + probeing
WHOIS / RDAP lookup
updated
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
All tools
Page nav
Page nav
iamroot.tech
Internet tools
DNS lookup
DNS propagation check
Port scan + probeing
WHOIS / RDAP lookup
updated
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
Internet tools
DNS lookup
DNS propagation check
Port scan + probeing
WHOIS / RDAP lookup
updated
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
CTRL+D to bookmark
Add to homescreen
×
Tap the 'Share button' at the bottom of the screen:
Scroll down the list, and select 'Add to Home Screen':
Tap the menu icon (3 dots - upper right-hand corner):
and select 'Add to homescreen'.:
ASN database
You may find these sub-pages interesting as well:
Top ASN's by country
Directory of +1.200 verified looking glass url's
NEW: ASN database statistics
Related tools
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
updated
221.144.0.0
Reverse DNS
221.144.0.0
CIDR calculator
beta
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.
What is my IPv4 and IPv6?
Check your own IP - both IPv4 and IPv6. Works as a connectivity test as well.
GeoIP location
221.144.0.0
World map, day/night + local time
beta
Beautiful day/night map of the world, with markup of all major cities including local date and time.
Result
221.144.0.0/12
Prefix:
221.144.0.0/12
(
1.048.576 IP's - view in CIDR to IP tool
)
Description:
Korea Telecom
Country:
Korea (South)
Announced by:
Korea Telecom
https://www.kt.com/eng/main.jsp
AS4766, 615 peers, 1.099 announced prefixes
See all details on AS4766 - Korea Telecom »
Matching prefixes
Country
ASN
Announced prefix
Description
Size
Korea (South)
AS4766
221.144.0.0/12
Korea Telecom
+1M
Korea (South)
AS55622
221.144.152.0/24
Korea Telecom
256
Korea (South)
AS152198
221.144.191.0/24
Korea Telecom
256
Korea (South)
AS45400
221.145.178.0/24
Korea Telecom
256
Korea (South)
AS9856
221.146.193.0/24
Korea Telecom
256
Korea (South)
AS9972
221.146.229.0/24
Korea Telecom
256
Korea (South)
AS17836
221.147.10.0/26
Korea Telecom
64
Korea (South)
AS45399
221.147.50.0/24
Korea Telecom
256
Korea (South)
AS9526
221.147.83.0/24
Korea Telecom
256
Korea (South)
AS9850
221.147.101.0/24
Korea Telecom
256
Korea (South)
AS55613
221.148.125.160/29
Korea Telecom
8
Korea (South)
AS10185
221.149.141.0/24
Korea Telecom
256
Korea (South)
AS9640
221.149.161.0/24
Korea Telecom
256
Korea (South)
AS45360
221.149.230.0/24
Korea Telecom
256
Korea (South)
AS131842
221.149.240.0/22
Korea Telecom
1.024
Korea (South)
AS10184
221.150.21.0/24
Korea Telecom
256
Korea (South)
AS55592
221.150.114.0/24
Korea Telecom
256
Korea (South)
AS17851
221.150.131.0/24
Korea Telecom
256
Korea (South)
AS38697
221.150.196.0/24
Korea Telecom
256
Korea (South)
AS38405
221.151.165.0/24
Korea Telecom
256
Korea (South)
AS9526
221.151.180.0/24
Korea Telecom
256
Korea (South)
AS10047
221.158.43.128/26
Korea Telecom
64
Korea (South)
AS17576
221.158.73.0/24
Korea Telecom
256
Korea (South)
AS55622
221.159.210.0/24
Korea Telecom
256
- - show more (+13 entries) - -
- - show less (-13 entries) - -
Log
000
+000
Parse input (Prefix)
000
+000
Search database for '221.144.0.0/12'
015
+015
24 prefixes found
015
+000
Done