All ASNs

Autonomous System details for AS61251

AS61251
Host4Biz sp. z o.o. • host4.biz

AS61251 — Host4Biz sp. z o.o.

AS Name
HOST4BIZ-AS
Country
Poland (PL)
Website
Number of IPv4
2,816
Number of IPv6
6.34 × 1029
ASN type
Business
Status
Allocated
Registry
RIPE
Allocated
May 13, 2016
Last updated
March 06, 2026

IP Ranges

4 IPv4 prefixes, 1 IPv6 prefixes
Prefix Company Number of IPs
77.73.36.0/22 Host4Biz sp. z o.o. 1,024
91.195.12.0/23 Host4Biz sp. z o.o. 512
91.232.127.0/24 Host4Biz sp. z o.o. 256
185.151.244.0/22 Host4Biz sp. z o.o. 1,024
2a07:7c80::/29 Host4Biz sp. z o.o. 6.34 × 1029

IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.

Peers of AS61251

0 peers

AS61251 has no peers recorded.

Peering is a direct, often free, traffic exchange between Autonomous Systems (ASNs). They share routes only to their own networks and customers, making connections faster and cheaper for that specific traffic, without providing full internet access to each other.

Upstreams of AS61251

4 upstreams

AS61251 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS61251 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS61251

1 downstreams

AS61251 provides internet connectivity to these downstream Autonomous Systems.

A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.

Our IP address tools

Explore all tools

What is my IP?

Discover your public IP address and detailed information about your connection.

CIDR to IP Range Converter (IPv4 and IPv6)

Convert CIDR notation to IP address ranges and vice versa. Useful for network configuration and security.

IP to Hostname/rDNS Lookup

Perform a reverse DNS (rDNS) lookup to get the hostname for an IP address.

IPv6 Expander/Collapser

Expand or collapse IPv6 addresses to their full or shortened forms for better readability and usage.