Waterloo 238, MD — rate center
- State
- Maryland
- Active prefixes
- 11
- Carriers
- 7
- Pooled prefixes
- 10
- LATA
- 238
- Metro area
- Baltimore-Columbia-Towson, MD MSA
Phone numbers "from Waterloo 238" are, precisely speaking, numbers whose prefixes are anchored to the Waterloo 238 rate center of Maryland, under 410, 443, 667.
11 central-office prefixes are currently anchored to this rate center across 7 carriers. 10 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 Waterloo 238
| Prefix | Code holder | Pooled |
|---|---|---|
| 410-799 | VERIZON MARYLAND, INC. | No |
| 410-904 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | Yes |
FAQ
What area code is Waterloo 238, MD?
Waterloo 238 is served by 3 area codes — 410, 443, 667 — which overlay the same territory.
How many prefixes does Waterloo 238 have?
11 active NXX prefixes are anchored to this rate center in NANPA records, held by 7 carriers.
Is a call from a Waterloo 238 prefix really from Waterloo 238?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.