AS11720 IBCP

IBCP is Independent Bank Corporation, the Grand Rapids, Michigan bank holding company (NASDAQ: IBCP) behind Independent Bank, a state-chartered community bank with a branch network across Michigan's Lower Peninsula. The handle is the company's stock ticker, and the AS carries the bank's own infrastructure.

What it's used for

This is about as small as a routed enterprise gets: two adjacent /24s, 198.17.60.0/24 and 198.17.61.0/24, 512 addresses total, and one observed neighbour in the RIS view. No IPv6. A single upstream and a single contiguous block is a network that exists to publish a handful of public-facing services — online banking front ends, VPN concentrators for branches and staff, mail and DNS — while everything that matters sits behind them on private space.

Both prefixes are registered in ARIN directly to Independent Bank Corporation under the IBCP-INTERNET handle. Holder, registrant and announcer are the same organisation, with no third-party registrants anywhere in the inventory, which is what rules out the address-leasing pattern outright. The addresses sampled returned no PTRs; that is a sample of four addresses out of 512 and supports no conclusion either way, so nothing is built on it here.

Notable

A bank's public AS is deliberately unexciting. The signal that matters for classification is the neighbour count: one upstream means this network consumes connectivity and never sells it, so it belongs in the enterprise bucket regardless of how the address space is arranged.