DEL MAR prefixes in area code 858
NANPA records 45 assigned NXX blocks to rate center DEL MAR in area code 858, 8.0% of the 564 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 19 holders hold those blocks, the largest being PACIFIC BELL (11), T-MOBILE USA, INC. (6), LEVEL 3 COMMUNICATIONS, LLC - CA (4). The earliest assignment on record here is 2002-01-16 and the most recent 2024-01-02. 33 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area code 619 – overlay codes cover the same geography, so a rate center is served by all of them.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 858-205 | T-Mobile T-MOBILE USA, INC. | 2002-01-16 | yes | yes |
| 858-209 | T-Mobile T-MOBILE USA, INC. | 2017-05-22 | yes | yes |
| 858-252 | T-Mobile T-MOBILE USA, INC. | 2014-10-08 | yes | yes |
| 858-259 | AT&T PACIFIC BELL | – | no | yes |
| 858-261 | T-Mobile T-MOBILE USA, INC. | 2015-02-18 | yes | yes |
| 858-280 | AT&T AT&T ENTERPRISES, LLC | 2016-08-08 | yes | yes |
| 858-284 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2014-05-15 | yes | yes |
| 858-290 | T-Mobile T-MOBILE USA, INC. | 2019-02-28 | yes | yes |
| 858-297 | NORTH COUNTY COMMUNICATION CORPORATION - CA | – | no | yes |
| 858-299 | Comcast COMCAST PHONE OF CALIFORNIA, LLC | – | yes | yes |
| 858-306 | Telnyx TELNYX LLC | – | yes | yes |
| 858-313 | T-Mobile T-MOBILE USA, INC. | 2021-03-11 | yes | yes |
| 858-314 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 858-342 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 858-345 | Comcast COMCAST PHONE OF CALIFORNIA, LLC | – | yes | yes |
| 858-347 | Spok SPOK, INC. | – | no | yes |
| 858-350 | AT&T PACIFIC BELL | – | no | yes |
| 858-353 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 858-356 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 858-369 | AT&T AT&T - LOCAL | – | yes | yes |
| 858-393 | COMMIO, LLC | 2024-01-02 | yes | yes |
| 858-436 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 858-461 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2006-01-06 | yes | yes |
| 858-465 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2013-03-29 | yes | yes |
| 858-480 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 858-481 | AT&T PACIFIC BELL | – | no | yes |
| 858-509 | AT&T PACIFIC BELL | – | no | yes |
| 858-519 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 858-523 | AT&T PACIFIC BELL | – | yes | yes |
| 858-617 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 858-703 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 858-704 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 858-720 | AT&T PACIFIC BELL | – | no | yes |
| 858-724 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 858-755 | AT&T PACIFIC BELL | – | no | yes |
| 858-764 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 858-792 | AT&T PACIFIC BELL | – | no | yes |
| 858-793 | AT&T PACIFIC BELL | – | no | yes |
| 858-794 | AT&T PACIFIC BELL | – | no | yes |
| 858-847 | AT&T PACIFIC BELL | – | yes | yes |
| 858-876 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 858-925 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 858-933 | FRACTEL, LLC | 2021-08-05 | yes | yes |
| 858-947 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | – | yes | yes |
| 858-977 | FRACTEL, LLC | 2020-03-27 | yes | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| PACIFIC BELL | AT&T | 11 | 24.4% |
| T-MOBILE USA, INC. | T-Mobile | 6 | 13.3% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 4 | 8.9% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 3 | 6.7% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Verizon | 3 | 6.7% |
| COMCAST PHONE OF CALIFORNIA, LLC | Comcast | 2 | 4.4% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 2 | 4.4% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 2 | 4.4% |
| FRACTEL, LLC | – | 2 | 4.4% |
| AT&T ENTERPRISES, LLC | AT&T | 1 | 2.2% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 1 | 2.2% |
| NORTH COUNTY COMMUNICATION CORPORATION - CA | – | 1 | 2.2% |
| TELNYX LLC | Telnyx | 1 | 2.2% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 1 | 2.2% |
| SPOK, INC. | Spok | 1 | 2.2% |
| AT&T - LOCAL | AT&T | 1 | 2.2% |
| COMMIO, LLC | – | 1 | 2.2% |
| PAETEC ITEL, LLC | Windstream | 1 | 2.2% |
| MATRIX TELECOM, LLC. S/I/I TNCI - CA | – | 1 | 2.2% |
Frequently asked
Which prefixes belong to DEL MAR in area code 858?
45 blocks: 205, 209, 252, 259, 261, 280, 284, 290, 297, 299, 306, 313 and 33 more, all listed in the table above.
Which carriers have numbers in DEL MAR?
PACIFIC BELL (11 blocks), T-MOBILE USA, INC. (6 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (4 blocks), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (3 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA (3 blocks), COMCAST PHONE OF CALIFORNIA, LLC (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is DEL MAR a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.