AS7752 THRES

Autonomous System 7752 (THRES) belongs to Threshold Communications, Inc., a

Redmond, Washington telecom provider serving businesses in the Seattle area and

the wider Pacific Northwest.

What it's used for

• Providing business connectivity and communications: dedicated internet access, broadband and 4G/5G links, hosted PBX and SIP trunking, colocation, and managed cloud/security services.
• Announcing roughly 9,000 IPv4 addresses — chiefly 209.189.192.0/19, its own ARIN allocation — plus a 2604:5000::/36 IPv6 block.

Notable

• Reverse DNS across the entire range follows one generic pattern, 209-189-NNN-NNN.ip.threshinc.net, with backbone routers named on the same domain (br01.sttlwawb.ip.threshinc.net — a Seattle, WA border router). There are no DSL, cable, PPPoE or dynamic-pool naming conventions anywhere in the space, which is the clearest signal that this is not an eyeball network.
• Read it as a B2B provider: addresses here sit at company offices, at customer sites and in colocation racks, not in homes. The company's published customer list is enterprises and public agencies rather than consumers.

Interesting

• The generic per-IP reverse-DNS pattern is common to both business ISPs and residential ones, so it is easy to misread on its own. What settles it here is the absence of subscriber-pool naming plus the operator's actual product line — a reminder that rDNS is most useful for what it does not say.