Ellicott City, MD — rate center

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

In NANP numbering, Ellicott City, Maryland is a rate center — the anchor point for local numbers. It is reached through 410, 443, 667 (multiple area codes serve it).

NANPA records show 29 active prefixes here, held by 14 different carriers. Pooling applies to 20 of them — individual thousands-blocks may belong to different companies.

The rate center belongs to the Baltimore-Columbia-Towson, MD Metropolitan Statistical Area. Routing-wise it sits in LATA 238.

Because 410, 443, 667 all serve this territory, two Ellicott City numbers can look completely different while being neighbors — check the prefix, not just the area code.

As always with US numbering: a prefix anchored to Ellicott City tells you where the block was issued. The person calling may have ported the number, moved away, or be spoofing it entirely — verify callers through independently found contact details.

Prefixes anchored to Ellicott City

FAQ

What area code is Ellicott City, MD?

Ellicott City is served by 3 area codes — 410, 443, 667 — which overlay the same territory.

How many prefixes does Ellicott City have?

29 active NXX prefixes are anchored to this rate center in NANPA records, held by 14 carriers.

Is a call from a Ellicott City prefix really from Ellicott City?

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