Waterloo 236, MD — rate center
- State
- Maryland
- Active prefixes
- 32
- Carriers
- 10
- Pooled prefixes
- 15
- LATA
- 236
- Metro area
- Baltimore-Columbia-Towson, MD MSA
The Waterloo 236 rate center (Maryland) anchors 32 active prefixes under area codes 410, 443, 667. Rate centers, not city limits, are what phone numbers are legally tied to.
32 central-office prefixes are currently anchored to this rate center across 10 carriers. 15 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 236.
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 236
| Prefix | Code holder | Pooled |
|---|---|---|
| 410-264 | VERIZON MARYLAND, INC. | Yes |
| 410-416 | AMERICAN MESSAGING SERVICES, LLC | No |
| 410-509 | BALTIMORE-WASHINGTON TELEPHONE (BWT) | No |
| 410-606 | VERIZON MARYLAND, INC. | No |
| 410-619 | AMERICAN MESSAGING SERVICES, LLC | No |
| 410-705 | BANDWIDTH.COM CLEC, LLC - MD | Yes |
| 410-722 | VERIZON MARYLAND, INC. | No |
| 410-724 | VERIZON MARYLAND, INC. | Yes |
| 410-738 | VERIZON MARYLAND, INC. | No |
| 410-791 | VERIZON MARYLAND, INC. | No |
| 410-792 | VERIZON MARYLAND, INC. | No |
| 410-797 | VERIZON MARYLAND, INC. | No |
| 410-813 | VERIZON MARYLAND, INC. | No |
| 410-815 | VERIZON MARYLAND, INC. | No |
| 410-824 | LEVEL 3 TELECOM OF MARYLAND, LLC - MD | Yes |
| 410-834 | CENTURYLINK COMMUNICATIONS, LLC | Yes |
| 410-854 | VERIZON MARYLAND, INC. | No |
| 410-862 | ONVOY, LLC - MD | Yes |
| 410-880 | VERIZON MARYLAND, INC. | No |
| 410-888 | VERIZON MARYLAND, INC. | Yes |
| 410-898 | VERIZON MARYLAND, INC. | No |
| 410-930 | REDI-CALL COMMUNICATIONS CO. | No |
| 410-985 | BALTIMORE-WASHINGTON TELEPHONE (BWT) | No |
FAQ
What area code is Waterloo 236, MD?
Waterloo 236 is served by 3 area codes — 410, 443, 667 — which overlay the same territory.
How many prefixes does Waterloo 236 have?
32 active NXX prefixes are anchored to this rate center in NANPA records, held by 10 carriers.
Is a call from a Waterloo 236 prefix really from Waterloo 236?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.