ResearchIRR · RIPE

AS8220:AS-COLTCZ AS numbers routed by Colt in the Czech Republic

An as-set registered in RIPE, maintained by COLT-MNT. It names 7 ASes and 0 sets directly; followed all the way down, it reaches 7 ASes through 0 nested sets.

Members

What AS8220:AS-COLTCZ lists

7 ASes and 0 sets, written in the object across every registry that holds it. Sets open their own page.

AS6363 EXTREME-NETWORKSAS8220 COLTAS15404 COLTAS24232 NTT-IN-AS-AP-3AS49142 HBOAS55256 NETSKOPEAS395266 KEYSIGHT-TECHNOLOGIES
Expanded

Every AS it reaches

What a filter built from AS8220:AS-COLTCZ would let in: 7 ASes.

Show the 7 ASes
AS6363AS8220AS15404AS24232AS49142AS55256AS395266
Prefixes

What AS8220:AS-COLTCZ covers

Every route object in the IRR whose origin is one of the 7 ASes it reaches: the prefixes a filter built from AS8220:AS-COLTCZ (with bgpq4, say) would allow. 909 IPv4 and 81 IPv6. Every one is in the IRR API.

909 IPv4 prefixes
103.138.100.0/22103.219.78.0/24103.219.79.0/24103.248.76.0/24103.47.244.0/24109.107.145.0/24110.50.78.0/23116.83.0.0/17118.67.224.0/1912.38.14.0/2412.38.15.0/24129.35.17.0/24129.35.20.0/23129.35.85.0/24129.41.90.0/24134.128.168.0/22134.141.0.0/16134.141.0.0/22134.141.10.0/23134.141.116.0/23134.141.121.0/24134.141.170.0/24134.141.188.0/23134.141.204.0/23134.141.237.0/24134.141.238.0/24134.141.4.0/24134.141.8.0/23136.225.0.0/16139.138.235.0/24139.138.240.0/24139.181.48.0/24141.98.45.0/24145.224.32.0/23146.92.0.0/17146.92.21.0/24146.92.47.0/24148.109.0.0/16148.109.25.0/24148.188.0.0/20148.188.192.0/20148.188.224.0/22148.188.232.0/21153.96.140.0/24153.96.141.0/24154.16.166.0/24155.137.0.0/24155.137.1.0/24155.137.2.0/24155.137.3.0/24155.137.7.0/24155.45.128.0/24156.118.0.0/24156.118.6.0/24156.118.8.0/24157.120.224.0/21157.120.236.0/22157.120.240.0/20157.2.32.0/19157.2.48.0/21157.239.128.0/24157.239.129.0/24158.156.155.0/24158.156.162.0/24158.156.172.0/24158.156.182.0/24158.156.193.0/24158.162.192.0/18158.162.32.0/19158.95.0.0/16158.95.0.0/23158.95.0.0/24158.95.10.0/24158.95.100.0/23158.95.102.0/23158.95.104.0/23158.95.106.0/23158.95.108.0/23158.95.11.0/24158.95.110.0/23158.95.112.0/23158.95.114.0/23158.95.116.0/23158.95.118.0/23158.95.12.0/23158.95.120.0/23158.95.122.0/23158.95.124.0/23158.95.126.0/23158.95.128.0/23158.95.130.0/23158.95.132.0/23158.95.134.0/23158.95.136.0/23158.95.138.0/23158.95.14.0/24158.95.140.0/23158.95.142.0/23158.95.144.0/23158.95.146.0/23158.95.148.0/23158.95.15.0/24158.95.150.0/23158.95.152.0/23158.95.154.0/23158.95.156.0/23158.95.158.0/23158.95.16.0/24158.95.160.0/23158.95.162.0/23158.95.164.0/23158.95.166.0/23158.95.168.0/23158.95.17.0/24158.95.170.0/23158.95.172.0/23158.95.174.0/23158.95.176.0/23158.95.178.0/23158.95.18.0/24158.95.180.0/23158.95.182.0/23158.95.184.0/23158.95.186.0/23158.95.188.0/23158.95.19.0/24158.95.190.0/24158.95.191.0/24158.95.192.0/24158.95.193.0/24158.95.194.0/23158.95.196.0/23158.95.198.0/23158.95.2.0/23158.95.20.0/23158.95.200.0/23158.95.202.0/23158.95.204.0/23158.95.206.0/23158.95.208.0/23158.95.210.0/23158.95.212.0/24158.95.213.0/24158.95.214.0/23158.95.216.0/23158.95.218.0/23158.95.22.0/23158.95.220.0/23158.95.222.0/24158.95.223.0/24158.95.228.0/23158.95.230.0/23158.95.232.0/23158.95.234.0/24158.95.235.0/24158.95.236.0/24158.95.237.0/24158.95.238.0/24158.95.239.0/24158.95.24.0/23158.95.240.0/24158.95.241.0/24158.95.242.0/24158.95.243.0/24158.95.244.0/24158.95.245.0/24158.95.246.0/24158.95.247.0/24158.95.248.0/24158.95.249.0/24158.95.250.0/24158.95.251.0/24158.95.26.0/23158.95.28.0/23158.95.30.0/24158.95.31.0/24158.95.32.0/23158.95.34.0/23158.95.36.0/23158.95.38.0/24158.95.39.0/24158.95.4.0/23158.95.40.0/23158.95.42.0/24158.95.43.0/24158.95.44.0/24158.95.45.0/24158.95.46.0/24158.95.47.0/24158.95.48.0/23158.95.50.0/24158.95.51.0/24158.95.52.0/23158.95.54.0/24158.95.55.0/24158.95.56.0/23158.95.58.0/24158.95.59.0/24158.95.6.0/23158.95.60.0/23158.95.62.0/24158.95.63.0/24158.95.64.0/23158.95.66.0/23158.95.68.0/23158.95.70.0/23158.95.72.0/23158.95.74.0/23158.95.76.0/23158.95.78.0/23158.95.8.0/24158.95.80.0/23158.95.82.0/23158.95.84.0/23158.95.86.0/23158.95.88.0/23158.95.9.0/24158.95.90.0/23158.95.92.0/23158.95.94.0/23158.95.96.0/23158.95.98.0/23161.17.0.0/16161.17.0.0/24162.10.0.0/16162.10.0.0/24162.10.1.0/24162.10.10.0/24162.10.100.0/24162.10.101.0/24162.10.102.0/24162.10.103.0/24162.10.11.0/24162.10.12.0/24162.10.125.0/24162.10.126.0/24162.10.128.0/22162.10.13.0/24162.10.132.0/24162.10.133.0/24162.10.134.0/24162.10.135.0/24162.10.136.0/22162.10.140.0/22162.10.144.0/24162.10.145.0/24162.10.146.0/24162.10.147.0/24162.10.148.0/22162.10.15.0/24162.10.152.0/22162.10.156.0/22162.10.16.0/24162.10.160.0/24162.10.161.0/24162.10.162.0/24162.10.163.0/24162.10.164.0/22162.10.168.0/24162.10.169.0/24162.10.17.0/24162.10.170.0/24162.10.171.0/24162.10.172.0/22162.10.176.0/22162.10.18.0/24162.10.180.0/22162.10.184.0/22162.10.188.0/22162.10.19.0/24162.10.192.0/24162.10.193.0/24162.10.194.0/24162.10.195.0/24162.10.196.0/22162.10.2.0/24162.10.20.0/24162.10.200.0/22162.10.204.0/24162.10.205.0/24162.10.206.0/24162.10.207.0/24162.10.208.0/24162.10.209.0/24162.10.21.0/24162.10.210.0/24162.10.211.0/24162.10.212.0/24162.10.213.0/24162.10.214.0/24162.10.215.0/24162.10.216.0/24162.10.217.0/24162.10.218.0/24162.10.22.0/24162.10.220.0/24162.10.221.0/24162.10.222.0/24162.10.223.0/24162.10.225.0/24162.10.226.0/24162.10.227.0/24162.10.228.0/24162.10.229.0/24162.10.23.0/24162.10.230.0/24162.10.231.0/24162.10.233.0/24162.10.234.0/24162.10.235.0/24162.10.236.0/24162.10.237.0/24162.10.238.0/24162.10.239.0/24162.10.24.0/24162.10.240.0/24162.10.241.0/24162.10.242.0/24162.10.243.0/24162.10.244.0/24162.10.245.0/24162.10.246.0/24162.10.247.0/24162.10.248.0/24162.10.249.0/24162.10.25.0/24162.10.250.0/24162.10.251.0/24162.10.252.0/24162.10.253.0/24162.10.254.0/24162.10.255.0/24162.10.26.0/24162.10.27.0/24162.10.28.0/24162.10.29.0/24162.10.3.0/24162.10.30.0/24162.10.31.0/24162.10.32.0/24162.10.33.0/24162.1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81 IPv6 prefixes
2001:1900:2281::/482001:678:1020::/482001:678:274::/482001:678:868::/482001:67c:2b20::/482001:67c:2b34::/482001:67c:2ea0::/482001:67c:424::/482001:67c:67c::/482001:920::/322001:921::/322001:924::/322001:925::/322001:926:40::/482001:926::/322400:81e0::/322404:5740::/482605:a900:300c::/482606:9fc0:d000::/472606:9fc0:d002::/472606:9fc0:d004::/472606:9fc0:d006::/472606:9fc0:d008::/472606:9fc0:d00a::/472606:9fc0:d00c::/472606:9fc0:d00e::/472606:9fc0:d010::/472606:9fc0:d012::/472606:9fc0:e000::/472606:9fc0:e002::/472606:9fc0:e004::/472606:9fc0:e004::/482606:9fc0:e005::/482606:9fc0:e006::/472606:9fc0:e008::/472606:9fc0:e00a::/472606:9fc0:e00c::/472606:9fc0:e00e::/472606:9fc0:e010::/472606:9fc0:e012::/472606:9fc0:e014::/472606:9fc0:e016::/472606:9fc0:e018::/472606:9fc0:e01a::/472606:9fc0:e01c::/472606:9fc0:e01e::/472606:9fc0:f000::/402606:9fc0:f100::/402606:9fc0:f200::/472606:9fc0:f202::/472606:9fc0:f204::/472606:9fc0:f206::/472606:9fc0:f208::/472606:9fc0:f20a::/472606:9fc0:f20c::/472606:9fc0:f20e::/472620:127:8000::/402a02:11f8:70::/482a04:f400:3001::/482a06:6540:1000::/362a06:6540:1001::/482a06:6540:1201::/482a06:6540:1241::/482a06:6540:1440::/482a06:6540:4101::/482a06:6540:4181::/482a06:6541:1000::/362a06:6541:1001::/482a06:6541:1201::/482a06:6541:1241::/482a06:6541:1440::/482a06:6541:4101::/482a06:6541:4181::/482a07:6f46:4500::/482a07:cb81::/322a0a:d6c0:145::/482a0e:900:d001::/482a10:8802::/362a10:8804:2000::/362a10:8804::/362a11:4d40::/48
Registries

Each registry’s copy

RIPE7 membersAS numbers routed by Colt in the Czech Republic
Maintained byCOLT-MNT
Last modified2026-09-09T14:27:50Z
MembersAS8220 AS15404 AS24232 AS49142 AS395266 AS6363 AS55256
mbrs-by-refN
Used by

Sets that include AS8220:AS-COLTCZ

AS8220:AS-COLTEU
Tools

Check AS8220:AS-COLTCZ live

IRR API, with prefixes