AS10520 EXECULINK

A secondary ASN of Execulink Telecom, an independent Ontario telephone-and-internet company. The handle is simply EXECULINK.

What it's used for

Execulink is a genuinely old Canadian operator: it traces back to a rural Ontario telephone company and grew by absorbing a string of small local telcos and ISPs, and it serves tens of thousands of subscribers today across southwestern Ontario. But almost none of that lives here. AS10520 announces 3 IPv4 prefixes totalling 512 addresses (205.210.156.0/23 plus the two component /24s), no IPv6, and RIS sees one neighbour.

The company's main eyeball network is carried under a different, much larger ASN — [AS7794](https://asn.ipinfo.app/AS7794). AS10520 is best read as a leftover: a legacy number and a legacy /23 that stayed attached to the group through the mergers and are still announced, rather than the AS that carries Execulink's subscribers.

Notable

The /23 is announced alongside both of its more-specific /24s. That is a common pattern for keeping a block reachable through more than one path or handing pieces of it to different downstream links, and it means the "3 prefixes" figure describes 512 unique addresses, not three separate networks.

Interesting

A good illustration of why an ASN's size tells you little about its holder's size. The brand behind this number is one of Ontario's larger independents; the number itself carries a /23.