AS10730 SN-DFO

SN-DFO is held by Syndeo Networks, Inc., a networking and managed-IT company based in St. Charles, Illinois. It builds and operates fibre connectivity, VoIP and managed network services for business customers across northern Illinois, and also manages address space on behalf of a handful of other organisations, including a municipal utility.

What it's used for

The routed footprint is minimal: RIS observes a single announced IPv4 prefix, 162.220.156.0/24 — 256 addresses — no IPv6, and 2 observed neighbours. Two neighbours is a plain dual-upstream arrangement, and a single /24 is the smallest globally routable unit. Nothing in the routing suggests a wholesale role; this looks like the company's own portable block, used for its network core, management and service endpoints, rather than a large pool handed out to customers.

That is worth stating plainly because the business description alone might suggest a bigger network. A regional fibre and managed-services provider often delivers connectivity over circuits and address space belonging to a carrier partner, or announces customer address space from other ASNs entirely. What is visible from this AS number is a small provider edge, not a mass-market access network — so treat any geolocation of these 256 addresses as "the operator's own infrastructure in northern Illinois", not as an end-user pool.

Notable

The handle SN-DFO looks like an internal designator (the DFO fragment is suggestive of dark-fibre optics, matching the company's fibre business) rather than anything meaningful about the network's role. Handles in this era of the registry are frequently department or product codes and should never be read as a classification.