MILLBRAE prefixes in area code 650
NANPA records 24 assigned NXX blocks to rate center MILLBRAE in area code 650, 3.3% of the 717 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. 11 holders hold those blocks, the largest being PACIFIC BELL (6), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (3), NEW CINGULAR WIRELESS PCS, LLC (3). The earliest assignment on record here is 2001-12-27 and the most recent 2022-09-08. 21 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 650-204 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 650-231 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-239 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 650-259 | AT&T PACIFIC BELL | – | yes | yes |
| 650-302 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-307 | T-Mobile T-MOBILE USA, INC. | 2001-12-27 | yes | yes |
| 650-409 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 650-443 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 650-455 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 650-490 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2002-01-28 | yes | yes |
| 650-552 | AT&T PACIFIC BELL | – | yes | yes |
| 650-609 | T-Mobile T-MOBILE USA, INC. | 2021-12-14 | yes | yes |
| 650-648 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-651 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 650-652 | AT&T PACIFIC BELL | – | yes | yes |
| 650-672 | Onvoy ONVOY, LLC - CA | 2022-09-08 | yes | yes |
| 650-684 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 650-686 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-689 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 650-692 | AT&T PACIFIC BELL | – | no | yes |
| 650-697 | AT&T PACIFIC BELL | – | no | yes |
| 650-732 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | yes | yes |
| 650-777 | AT&T PACIFIC BELL | – | yes | yes |
| 650-942 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2003-08-15 | 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 | 6 | 25% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 3 | 12.5% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 3 | 12.5% |
| ONVOY, LLC - CA | Onvoy | 2 | 8.3% |
| T-MOBILE USA, INC. | T-Mobile | 2 | 8.3% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 2 | 8.3% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 2 | 8.3% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 1 | 4.2% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Verizon | 1 | 4.2% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 1 | 4.2% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 1 | 4.2% |
Frequently asked
Which prefixes belong to MILLBRAE in area code 650?
24 blocks: 204, 231, 239, 259, 302, 307, 409, 443, 455, 490, 552, 609 and 12 more, all listed in the table above.
Which carriers have numbers in MILLBRAE?
PACIFIC BELL (6 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (3 blocks), NEW CINGULAR WIRELESS PCS, LLC (3 blocks), ONVOY, LLC - CA (2 blocks), T-MOBILE USA, INC. (2 blocks), U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is MILLBRAE 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.