AS11713 GBGDC-IP1

GBGDC-IP1 belongs to Granite Block Global Data Center, Inc., a colocation, application-hosting and disaster-recovery provider operating out of a large converted mill building in Fall River, Massachusetts. The AS exists to multihome that facility and to route address space for the customers inside it.

What it's used for

RIS sees five /24s, 1,280 addresses in total, against two observed neighbours. That is a facility network, not a carrier: a data centre operator of this size buys transit from a couple of upstreams and announces a handful of blocks for the tenants and managed-hosting platforms in the building. The address count is small because colocation customers commonly bring or are assigned only what they need.

The registrant list reads exactly as a small colo should. 162.220.47.0/24 and 66.37.47.0/24 are registered to Granite Block, and 63.119.164.0/24 to Granite Block Global Data Center, Inc. 38.27.118.0/24 is COGENT-A — provider-assigned Cogent space, the normal shape for a facility that takes Cogent transit, not a third-party lease. The one genuinely external registrant, 50.202.38.0/24 under Congruity360, is a Massachusetts data-management company associated with the same Fall River site; its businesslearningnetwork.com reverse DNS is a tenant's workload, which is precisely what a hosting AS is supposed to carry.

Notable

Sampled PTRs on the 162.220.47 and 66.37.47 blocks resolve under lightower.net — Lightower, now part of Crown Castle Fiber. That is upstream default reverse DNS wearing through on customer space, and a reminder that a PTR names what the address sits behind, never who holds the AS.