AS11685 HNBCOL-AS

HNBCOL-AS is the autonomous system of Huntington National Bank, the Columbus, Ohio regional bank — the handle reads as Huntington National Bank / Columbus. The address space it announces is registered to Huntington Bancshares Inc., the bank's holding company.

What it's used for

Corporate and branch connectivity for a bank, not a service provider. RIS sees 32 announced v4 prefixes carrying 66,048 addresses against six observed neighbours. Practically all of it is 170.128.0.0/16 — a legacy class B — announced whole and then sliced into /17s, /22s, /23s and /24s, with 192.231.198.0/24 alongside. A large block behind a small handful of upstreams is the enterprise pattern; a network moving this much space as a carrier would peer with hundreds of ASes rather than six.

Notable

The deaggregation is the interesting operational detail. Announcing the covering /16 plus both halves as /17s, and then a long tail of more-specifics, is deliberate inbound traffic engineering: different chunks of the bank's estate are steered toward different upstreams while the covering route guarantees reachability if any single announcement is lost. Financial institutions lean on this because path control and failover matter more to them than a tidy routing table.

Interesting

Registrant and holder differ in name only — Huntington Bancshares is the parent of Huntington National Bank. Intra-group registration like this is exactly the false positive that should not be mistaken for third-party or leased address space; the tell for that is unrelated registrants, and there are none here.