SNDG MRMS prefixes in area code 858
NANPA records 69 assigned NXX blocks to rate center SNDG MRMS in area code 858, 12.2% 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. 21 holders hold those blocks, the largest being PACIFIC BELL (21), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (10), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA (5). The earliest assignment on record here is 2001-09-13 and the most recent 2026-08-07. 58 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 |
|---|---|---|---|---|
| 858-201 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 858-225 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | – | yes | yes |
| 858-226 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2014-09-09 | yes | yes |
| 858-229 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2001-09-13 | no | yes |
| 858-237 | NORTH COUNTY COMMUNICATION CORPORATION - CA | – | no | yes |
| 858-239 | Onvoy ONVOY, LLC - CA | 2014-12-05 | yes | yes |
| 858-253 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2015-02-16 | yes | yes |
| 858-258 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2018-06-07 | yes | yes |
| 858-265 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2015-07-02 | yes | yes |
| 858-267 | T-Mobile T-MOBILE USA, INC. | 2015-09-25 | yes | yes |
| 858-271 | AT&T PACIFIC BELL | – | yes | yes |
| 858-275 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2014-04-08 | yes | yes |
| 858-282 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2017-04-14 | yes | yes |
| 858-287 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2014-08-11 | yes | yes |
| 858-288 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2019-01-22 | yes | yes |
| 858-293 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 2019-05-16 | yes | yes |
| 858-305 | T-Mobile T-MOBILE USA, INC. | 2021-02-17 | yes | yes |
| 858-307 | AT&T PACIFIC BELL | 2017-11-22 | yes | yes |
| 858-322 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2015-11-13 | yes | yes |
| 858-329 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2016-06-14 | yes | yes |
| 858-348 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 858-357 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 858-368 | IP HORIZON LLC | – | yes | yes |
| 858-378 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2014-11-14 | yes | yes |
| 858-397 | Comcast COMCAST PHONE OF CALIFORNIA, LLC | – | yes | yes |
| 858-398 | Onvoy ONVOY, LLC - CA | 2023-01-20 | yes | yes |
| 858-408 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 858-414 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2002-05-17 | no | yes |
| 858-433 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 858-437 | AT&T PACIFIC BELL | – | yes | yes |
| 858-444 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 858-445 | T-Mobile T-MOBILE USA, INC. | 2025-11-28 | yes | yes |
| 858-468 | Onvoy ONVOY, LLC - CA | 2026-08-07 | yes | no |
| 858-471 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2018-03-06 | yes | yes |
| 858-527 | AT&T PACIFIC BELL | – | yes | yes |
| 858-530 | AT&T PACIFIC BELL | – | yes | yes |
| 858-536 | AT&T PACIFIC BELL | – | yes | yes |
| 858-537 | AT&T PACIFIC BELL | – | yes | yes |
| 858-547 | AT&T PACIFIC BELL | – | no | yes |
| 858-549 | AT&T PACIFIC BELL | – | no | yes |
| 858-564 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 858-566 | AT&T PACIFIC BELL | – | no | yes |
| 858-577 | AT&T PACIFIC BELL | – | no | yes |
| 858-578 | AT&T PACIFIC BELL | – | no | yes |
| 858-586 | AT&T PACIFIC BELL | – | yes | yes |
| 858-610 | T-Mobile T-MOBILE USA, INC. | 2002-08-30 | yes | yes |
| 858-621 | AT&T PACIFIC BELL | – | yes | yes |
| 858-630 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | – | yes | yes |
| 858-635 | AT&T PACIFIC BELL | – | yes | yes |
| 858-644 | FRACTEL, LLC | 2021-09-23 | yes | yes |
| 858-653 | AT&T PACIFIC BELL | – | yes | yes |
| 858-684 | AT&T PACIFIC BELL | – | yes | yes |
| 858-688 | T-Mobile METROPCS, INC. | 2001-09-24 | yes | yes |
| 858-689 | AT&T PACIFIC BELL | – | no | yes |
| 858-693 | AT&T PACIFIC BELL | – | no | yes |
| 858-695 | AT&T PACIFIC BELL | – | yes | yes |
| 858-728 | Spok SPOK, INC. | – | no | yes |
| 858-740 | AT&T AT&T - LOCAL | – | yes | yes |
| 858-757 | Onvoy ONVOY, LLC - CA | 2016-01-29 | yes | yes |
| 858-761 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 858-790 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 858-800 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | – | yes | yes |
| 858-805 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 858-831 | AT&T PACIFIC BELL | – | yes | yes |
| 858-860 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 858-863 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 858-877 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 858-880 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 858-935 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | 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 | 21 | 30.4% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 10 | 14.5% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Verizon | 5 | 7.2% |
| ONVOY, LLC - CA | Onvoy | 4 | 5.8% |
| T-MOBILE USA, INC. | T-Mobile | 4 | 5.8% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 4 | 5.8% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 3 | 4.3% |
| MATRIX TELECOM, LLC. S/I/I TNCI - CA | – | 2 | 2.9% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 2 | 2.9% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 2 | 2.9% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 2 | 2.9% |
| NORTH COUNTY COMMUNICATION CORPORATION - CA | – | 1 | 1.4% |
| IP HORIZON LLC | – | 1 | 1.4% |
| COMCAST PHONE OF CALIFORNIA, LLC | Comcast | 1 | 1.4% |
| PAETEC ITEL, LLC | Windstream | 1 | 1.4% |
| FRACTEL, LLC | – | 1 | 1.4% |
| METROPCS, INC. | T-Mobile | 1 | 1.4% |
| SPOK, INC. | Spok | 1 | 1.4% |
| AT&T - LOCAL | AT&T | 1 | 1.4% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 1 | 1.4% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 1 | 1.4% |
Frequently asked
Which prefixes belong to SNDG MRMS in area code 858?
69 blocks: 201, 225, 226, 229, 237, 239, 253, 258, 265, 267, 271, 275 and 57 more, all listed in the table above.
Which carriers have numbers in SNDG MRMS?
PACIFIC BELL (21 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (10 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA (5 blocks), ONVOY, LLC - CA (4 blocks), T-MOBILE USA, INC. (4 blocks), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (4 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is SNDG MRMS 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.