FRNK GRNLF prefixes in area code 510
NANPA records 25 assigned NXX blocks to rate center FRNK GRNLF in area code 510, 3.2% of the 785 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. 12 holders hold those blocks, the largest being PACIFIC BELL (10), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2), LEVEL 3 COMMUNICATIONS, LLC - CA (2). The earliest assignment on record here is 2001-05-17 and the most recent 2019-04-17. 19 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 341 – 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 |
|---|---|---|---|---|
| 510-240 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 510-324 | AT&T PACIFIC BELL | – | yes | yes |
| 510-400 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 510-401 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 510-404 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 510-429 | AT&T PACIFIC BELL | – | no | yes |
| 510-431 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 510-441 | AT&T PACIFIC BELL | – | yes | yes |
| 510-462 | Onvoy ONVOY, LLC - CA | 2016-05-04 | yes | yes |
| 510-471 | AT&T PACIFIC BELL | – | no | yes |
| 510-474 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 510-475 | AT&T PACIFIC BELL | – | no | yes |
| 510-476 | AT&T PACIFIC BELL | – | yes | yes |
| 510-477 | AT&T PACIFIC BELL | – | no | yes |
| 510-487 | AT&T PACIFIC BELL | – | no | yes |
| 510-489 | AT&T PACIFIC BELL | – | no | yes |
| 510-491 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 510-675 | AT&T PACIFIC BELL | – | yes | yes |
| 510-870 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 510-941 | Comcast COMCAST PHONE OF CALIFORNIA, LLC | 2016-12-12 | yes | yes |
| 510-945 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2015-04-10 | yes | yes |
| 510-952 | T-Mobile METROPCS, INC. | 2001-05-17 | yes | yes |
| 510-961 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2019-04-17 | yes | yes |
| 510-972 | Comcast COMCAST PHONE OF CALIFORNIA, LLC | – | yes | yes |
| 510-991 | Onvoy ONVOY, 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 | 10 | 40% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 2 | 8% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 2 | 8% |
| ONVOY, LLC - CA | Onvoy | 2 | 8% |
| COMCAST PHONE OF CALIFORNIA, LLC | Comcast | 2 | 8% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 1 | 4% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 1 | 4% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Verizon | 1 | 4% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 1 | 4% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 1 | 4% |
| METROPCS, INC. | T-Mobile | 1 | 4% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 1 | 4% |
Same rate center in other codes
Overlay codes cover the same geography, so one rate center is served by all of them.
Frequently asked
Which prefixes belong to FRNK GRNLF in area code 510?
25 blocks: 240, 324, 400, 401, 404, 429, 431, 441, 462, 471, 474, 475 and 13 more, all listed in the table above.
Which carriers have numbers in FRNK GRNLF?
PACIFIC BELL (10 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (2 blocks), ONVOY, LLC - CA (2 blocks), COMCAST PHONE OF CALIFORNIA, LLC (2 blocks), LEVEL 3 TELECOM OF CALIFORNIA, LP - CA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is FRNK GRNLF 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.