Essex, MD — rate center
- State
- Maryland
- Active prefixes
- 30
- Carriers
- 11
- Pooled prefixes
- 24
- LATA
- 238
- Metro area
- Baltimore-Columbia-Towson, MD MSA
In NANP numbering, Essex, Maryland is a rate center — the anchor point for local numbers. It is reached through 410, 443, 667 (multiple area codes serve it).
The rate center currently carries 30 working prefixes, held by 11 different carriers. Pooling applies to 24 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 Essex numbers can look completely different while being neighbors — check the prefix, not just the area code.
A Essex prefix on caller ID is a starting point, not proof of origin — numbers travel with their owners and displays can be spoofed. Use official callback numbers for anything sensitive.
Prefixes anchored to Essex
| Prefix | Code holder | Pooled |
|---|---|---|
| 410-238 | VERIZON MARYLAND, INC. | Yes |
| 410-391 | VERIZON MARYLAND, INC. | No |
| 410-406 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | Yes |
| 410-574 | VERIZON MARYLAND, INC. | No |
| 410-682 | VERIZON MARYLAND, INC. | Yes |
| 410-686 | VERIZON MARYLAND, INC. | No |
| 410-687 | VERIZON MARYLAND, INC. | No |
| 410-780 | VERIZON MARYLAND, INC. | No |
| 410-866 | VERIZON MARYLAND, INC. | No |
| 410-918 | VERIZON MARYLAND, INC. | Yes |
FAQ
What area code is Essex, MD?
Essex is served by 3 area codes — 410, 443, 667 — which overlay the same territory.
How many prefixes does Essex have?
30 active NXX prefixes are anchored to this rate center in NANPA records, held by 11 carriers.
Is a call from a Essex prefix really from Essex?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.