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CIDR calculator
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ASN database lookup
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iamroot.tech
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
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
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
Perform WHOIS and/or RDAP lookups on domains, IP addresses, and ASNs. Will output all available technical info, contact info, etc.
Reverse DNS
Perform reverse DNS (rDNS/PTR) lookups of any IP.
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
Online tool GeoIP location of any IP and/or domain.
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.
Top ASN's from Czech Republic
Top 3 of Czech Republic
AS16019
Vodafone Czech Republic a.s.
119 peers, +1M IPv4 adresses and 5,9E+30 IPv6 adresses.
AS29208
Quantcom, a.s.
917 peers, +254K IPv4 adresses and 2,4E+29 IPv6 adresses.
AS2852
CESNET z.s.p.o.
222 peers, +848K IPv4 adresses and 6,3E+29 IPv6 adresses.
Top 20 by count of peers
Country
ASN
Organization
Peers
IX'es
IPv4
IPv6
Czech Republic
AS29208
Quantcom, a.s.
917
7
+254K
2,4E+29
Czech Republic
AS29504
Freenet Liberec, z.s.
292
2
1.024
6,3E+29
Czech Republic
AS2852
CESNET z.s.p.o.
222
2
+848K
6,3E+29
Czech Republic
AS28725
CETIN a.s.
209
8
+133K
7,1E+29
Czech Republic
AS6881
NIX.CZ z.s.p.o.
201
2
2.560
1,6E+29
Czech Republic
AS25192
CZ.NIC, z.s.p.o.
169
10
6.400
7,9E+28
Czech Republic
AS49121
Infinity Telecom, s.r.o.
159
8
5.632
3,6E+24
Czech Republic
AS208414
WEDOS Internet, a.s.
157
19
1.280
6,8E+25
Czech Republic
AS39392
SH.cz s.r.o.
129
1
+31K
1,3E+30
Czech Republic
AS43037
Seznam.cz, a.s.
123
3
3.072
7,9E+28
Czech Republic
AS16019
Vodafone Czech Republic a.s.
119
1
+1M
5,9E+30
Czech Republic
AS47232
ISP Alliance a.s.
116
2
+21K
1,9E+30
Czech Republic
AS61973
Netassist International s.r.o.
110
-
-
-
Czech Republic
AS63113
Globecorp Networks
105
1
3.072
-
Czech Republic
AS49025
PRO-ZETA a.s.
94
5
7.168
5,0E+27
Czech Republic
AS200070
CZ.NIC, z.s.p.o.
86
6
1.024
6,0E+24
Czech Republic
AS42000
Futruy s.r.o.
80
2
7.424
6,3E+29
Czech Republic
AS15935
ha-vel internet s.r.o.
79
5
+51K
7,9E+28
Czech Republic
AS5610
O2 Czech Republic, a.s.
66
1
+1M
8,7E+29
Czech Republic
AS25248
RADIOKOMUNIKACE a.s.
62
3
+106K
7,9E+28
Top 10 by count of IPv4
Country
ASN
Organization
Peers
IX'es
IPv4
IPv6
Czech Republic
AS5610
O2 Czech Republic, a.s.
66
1
+1M
8,7E+29
Czech Republic
AS16019
Vodafone Czech Republic a.s.
119
1
+1M
5,9E+30
Czech Republic
AS13036
T-Mobile Czech Republic a.s.
1
-
+958K
7,1E+29
Czech Republic
AS2852
CESNET z.s.p.o.
222
2
+848K
6,3E+29
Czech Republic
AS44546
ALFA TELECOM s.r.o.
2
-
+526K
-
Czech Republic
AS29208
Quantcom, a.s.
917
7
+254K
2,4E+29
Czech Republic
AS30764
PODA a.s.
39
2
+222K
1,6E+29
Czech Republic
AS2571
DHL Information Services (Europe) s.r.o
7
-
+148K
5,8E+25
Czech Republic
AS5588
T-Mobile Czech Republic a.s.
57
3
+147K
2,4E+29
Czech Republic
AS16246
Nej.cz s.r.o.
34
2
+135K
8,7E+29
Top 10 by count of IPv6
Country
ASN
Organization
Peers
IX'es
IPv4
IPv6
Czech Republic
AS16019
Vodafone Czech Republic a.s.
119
1
+1M
5,9E+30
Czech Republic
AS204860
NetX Networks a.s.
25
2
1.536
4,6E+30
Czech Republic
AS42306
Edera Group a.s.
33
2
+20K
2,5E+30
Czech Republic
AS44489
STARNET, s.r.o.
25
1
+54K
2,1E+30
Czech Republic
AS47232
ISP Alliance a.s.
116
2
+21K
1,9E+30
Czech Republic
AS207187
TKR Jasek, s.r.o.
25
1
+14K
1,9E+30
Czech Republic
AS24971
Master Internet s.r.o.
38
5
+58K
1,7E+30
Czech Republic
AS31246
Nej.cz s.r.o.
29
4
+66K
1,5E+30
Czech Republic
AS42908
Nordic Telecom Regional s.r.o.
41
2
+41K
1,4E+30
Czech Republic
AS39392
SH.cz s.r.o.
129
1
+31K
1,3E+30