Church Hill, MD — rate center

NANPA rate center & CO code data, current as of July 28, 2026.

Phone numbers "from Church Hill" are, precisely speaking, numbers whose prefixes are anchored to the Church Hill rate center of Maryland, under 410, 667.

4 central-office prefixes are currently anchored to this rate center across 4 carriers. 4 prefixes participate in thousands-block pooling, so blocks of 1,000 numbers are shared between carriers.

The rate center belongs to the Baltimore-Columbia-Towson, MD Metropolitan Statistical Area. Routing-wise it sits in LATA 242.

Multiple area codes over one rate center (410/667) is the overlay pattern: same geography, different first three digits.

With only 4 prefixes, Church Hill sits at the small end of Maryland's rate centers — a handful of carrier blocks cover the whole locality, and a number from here is a fairly strong locality signal (before porting is considered).

Treat this data as geography of the number, not of the caller: porting, VoIP and caller-ID spoofing all detach the two. When a call matters, hang up and call back through an official number.

Prefixes anchored to Church Hill

FAQ

What area code is Church Hill, MD?

Church Hill is served by 2 area codes — 410, 667 — which overlay the same territory.

How many prefixes does Church Hill have?

4 active NXX prefixes are anchored to this rate center in NANPA records, held by 4 carriers.

Is a call from a Church Hill prefix really from Church Hill?

Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.