Crofton, MD — rate center
- State
- Maryland
- Active prefixes
- 11
- Carriers
- 7
- Pooled prefixes
- 9
- LATA
- 238
- Metro area
- Baltimore-Columbia-Towson, MD MSA
The Crofton rate center (Maryland) anchors 11 active prefixes under area codes 410, 443, 667. Rate centers, not city limits, are what phone numbers are legally tied to.
11 central-office prefixes are currently anchored to this rate center across 7 carriers. 9 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 238.
Multiple area codes over one rate center (410/443/667) is the overlay pattern: same geography, different first three digits.
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 Crofton
| Prefix | Code holder | Pooled |
|---|---|---|
| 410-451 | VERIZON MARYLAND, INC. | No |
| 410-721 | VERIZON MARYLAND, INC. | No |
| 410-774 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | Yes |
FAQ
What area code is Crofton, MD?
Crofton is served by 3 area codes — 410, 443, 667 — which overlay the same territory.
How many prefixes does Crofton have?
11 active NXX prefixes are anchored to this rate center in NANPA records, held by 7 carriers.
Is a call from a Crofton prefix really from Crofton?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.