AS15391 SYSCL1 Sysclay Sp. z o. o.

SYSCL1 Sysclay Sp. z o. o. · registered in Poland

IPv4 addresses6,1447 prefixes · <0.001% of announced IPv4

Rank in Poland#198largest network in PL by IPv4 space, of 2,091 · 0.03% of PL

Rank worldwide#12,107of 79,396 networks with IPv4

IPv640 x /32 (2,621,440 x /48)5 prefixes

CountryPoland2,145 ASNs registered there

Open AS15391 in ASN lookup Look up an IP in this network (45.145.208.1) All networks in Poland

IPv4 prefixes

All 7 prefixes, in address order.

45.145.208.0/22
45.146.44.0/22
45.155.0.0/22
185.122.136.0/22
185.242.32.0/22
193.22.240.0/23
193.22.246.0/23

IPv6 prefixes

All 5 prefixes.

2a05:d8c0::/29
2a06:83c0::/29
2a0e:e1c0::/29
2a0f:a080::/29
2a0f:a900::/29

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AS49633#199 MGK-AS MGK Fiber Sp. z o.o.6,144

AS8535#200 AGORA Agora TC Sp.z.o.o.6,144

AS28978#201 COIG-AS COIG S.A6,144

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources