AS61251 — HOST4BIZ-AS Host4Biz sp. z o.o.

AS61251 announces 4 IPv4 prefixes covering 2,816 addresses and 1 IPv6 prefixes.

About this network

HOST4BIZ-AS is operated by Host4Biz sp. z o.o.

What it's used for

• The address space carries hosting infrastructure, evidenced by the reverse DNS record 185.151.246.254.hosted-by-host4.biz and netnames such as PL-HOST4BIZ-3-20180618.
• The AS announces 2816 IPv4 addresses across 4 prefixes and 1 IPv6 prefix, with only 3 observed neighbours, indicating a hosting or business network rather than a transit provider.
• Traffic from this AS consists of web hosting, server, and cloud services for customers in Poland, France, Germany, and the USA.

Notable

• All registrants for the announced prefixes are consistent with the announcer, listing Host4Biz NOC and Host4Biz sp. z o.o..
• The address inventory is composed of four distinct IPv4 blocks and one IPv6 block, all registered to the same entity.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 77.73.36.0/22
• 91.195.12.0/23
• 91.232.127.0/24
• 185.151.244.0/22
• 2a07:7c80::/29

Upstream networks

• AS8308 PANSTWOWY INSTYTUT BADAWCZY
• AS15694 Atman Sp. z o.o.

Downstream networks

• AS34859 ZYN LINE LLC

Adjacent networks

• AS34859 ZYN LINE LLC
• AS15694 Atman Sp. z o.o.
• AS8308 PANSTWOWY INSTYTUT BADAWCZY

Routing security

• RPKI: 0 valid, 0 invalid and 5 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 8 route objects.
• Listed in as-sets: AS-FOTONTELECOM, AS-HOST4BIZ, AS-HURRICANEV6, AS24748:AS-THINX6, AS42861:AS-CUSTOMERS, AS5617:AS-PL, AS8308:AS-CUST-TRANSIT.