Autonomous System details

AS28725

Cetin A.S. — cetin.cz

Summary

Country
CZ Czechia
Organization Cetin A.S.
Domain cetin.cz
Number of IPv4 137,984
Number of IPv6 7.1305× 1029
AS Type ISP
Registry RIPE NCC
Allocated February 10, 2003 (about 22 years ago)
Updated March 24, 2020 (about 5 years ago)

IP Ranges

AS28725 announces 7 IPv4 ranges and 2 IPv6 ranges.

That's a total of 137,984 IPv4 addresses and 7.1305× 1029 IPv6 addresses.

Prefix Organization Size Registry Status
80.74.32.0/20
CZ CETIN
4,096 RIPE NCC ASSIGNED PA
85.162.0.0/16
CZ Cetin A.S.
65,536 RIPE NCC ASSIGNED PA
85.163.0.0/16
CZ Cetin A.S.
65,536 RIPE NCC ALLOCATED PA
136.238.226.0/24
CH Schindler Informatik AG
256 ARIN REASSIGNMENT
185.218.92.0/23
CZ Pernstejn.net, Z.S.
512 RIPE NCC ASSIGNED PA
194.50.64.0/22
CZ Czech Republic, Ministerstvo Obrany
1,024 RIPE NCC ASSIGNED PI
194.147.12.0/22
CZ Cetin A.S.
1,024 RIPE NCC ALLOCATED PA
Prefix Organization Size Registry Status
2a07:1f40::/29
CZ CETIN-infra
6.3383× 1029 RIPE NCC ASSIGNED
2a0b:bb40::/32
CZ Pernstejn.net, Z.S.
7.9228× 1028 RIPE NCC ASSIGNED

Peers

AS28725 actively fosters the following peering relationships that enhance network performance through direct, settlement-free traffic exchange. Even with a modest number of peers, each connection serves as a strategic asset—optimizing routing, reducing latency, and minimizing transit costs.

AS293 AS553 AS559 AS680 AS1031 AS1103 AS1140 AS1239 AS1267 AS1764 AS1828 AS1836 AS2119 AS3170 AS3214 AS3216 AS3333 AS3741 AS4455 AS5398 AS5405 AS5713 AS6057 AS6233 AS6424 AS6461 AS6777 AS6939 AS7195 AS7713 AS8218 AS8283 AS8298 AS8426 AS8758 AS8896 AS9044 AS9902 AS12552 AS12637 AS12779 AS12859 AS12969 AS13030 AS13237 AS14537 AS14630 AS14907 AS15547 AS15576 AS15605 AS16347 AS16552 AS17639 AS18106 AS20485 AS20764 AS20932 AS21412 AS23106 AS24482 AS24889 AS24961 AS25091 AS25160 AS25220 AS28716 AS28792 AS28917 AS29075 AS29140 AS29504 AS30844 AS31510 AS31742 AS33891 AS34019 AS34177 AS34224 AS34288 AS34549 AS34927 AS35266 AS35280 AS35360 AS35369 AS35598 AS35625 AS35710 AS36994 AS37100 AS37468 AS37497 AS37662 AS37721 AS38880 AS39120 AS39122 AS39351 AS40994 AS41047 AS41327 AS41811 AS42473 AS42541 AS45352 AS47147 AS47160 AS47692 AS47957 AS48070 AS48362 AS48858 AS48919 AS49544 AS49605 AS50300 AS50304 AS50629 AS50673 AS50763 AS51088 AS51184 AS51185 AS51873 AS52320 AS55329 AS56987 AS57695 AS57777 AS58057 AS58299 AS58511 AS59605 AS59890 AS60068 AS61568 AS62167 AS63927 AS64475 AS132337 AS137409 AS198385 AS199524 AS199938 AS202297 AS205112 AS206356 AS207841 AS210937 AS212483 AS213151 AS213241 AS263152 AS398465

Upstreams

AS28725 connects to the global Internet via at least 3 upstream providers. In this setup, AS28725 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.

AS174 AS1299 AS22356

Downstreams

AS28725 serves as a transit provider the following ASes, delivering the BGP routes needed for global connectivity. This downstream relationship underscores AS28725's role in extending Internet access beyond its own infrastructure.

AS19637 AS24641 AS29298 AS35046 AS35613 AS47868 AS48364 AS50784 AS51382 AS51420 AS52029 AS56427 AS57294 AS57560 AS196849 AS196952 AS197197 AS197565 AS198248 AS201265 AS203365 AS203645 AS204351 AS205619 AS206177 AS206438 AS209947 AS211826 AS212859 AS212975

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