California, United States
Pacific Time
10:23 PM
Area Code
661
State / Province
California
Country
United States
Time Zone
Pacific Time
Area code 661 covers 27 cities and communities across California, based on telephone company rate center data.
Use the E.164 format for clickable phone links (RFC 3966):
<a href="tel:+16615550100">+16615550100</a><a href="tel:+16615550199">+16615550199</a>Look up which exchange in California a specific 661 number is homed to, and whether its block is wireline or wireless. See what a reverse lookup can establish before relying on the answer.
673 active prefixes in this area code, assigned as 5,715 thousands-blocks — pooling splits one prefix across several carriers, so each block is listed separately with the rate centre it is homed to, its carrier of record, and the switch that serves it.
Showing blocks 1–100 of 5,715
| NPA-NXX | Block | Rate centre | Type | Carrier (OCN) | Switch | LATA | LIR | Dates |
|---|---|---|---|---|---|---|---|---|
| 661-200 | 0 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CA (8826) | LOS ANGELES | 730 | — | — |
| 661-200 | 1 | Santa Clarita: Newhall-Castaic DA | Landline | PACIFIC BELL (9740) | NEWHALL | 730 | — | — |
| 661-200 | 2 | Santa Clarita: Newhall-Castaic DA | Landline | PACIFIC BELL (9740) | NEWHALL | 730 | — | — |
| 661-200 | 3 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | TWC IP ENABLED SERVICES, LLC (793K) | SHOKCA02QMD | 730 | — | — |
| 661-200 | 4 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-200 | 5 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | BLOOMINGTON | 730 | — | — |
| 661-200 | 6 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | PAETEC ITEL, LLC (829J) | ANHMCANG5MD | 730 | — | — |
| 661-200 | 7 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | ONVOY, LLC - CA (649C) | LOS ANGELES | 730 | — | — |
| 661-200 | 8 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-200 | 9 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LSANCA039MD | 730 | — | — |
| 661-200 | A | Santa Clarita: Newhall-Castaic DA | Landline | PACIFIC BELL (9740) | NEWHALL | 730 | — | — |
| 661-201 | 0 | Bakersfield: Main DA | Wireless | T-MOBILE USA, INC. (6529) | BKFDCA01X2X | 734 | — | — |
| 661-201 | 1 | Bakersfield: Main DA | Wireless | T-MOBILE USA, INC. (6529) | BKFDCA01X2X | 734 | — | — |
| 661-201 | 2 | Bakersfield: Main DA | Wireless | T-MOBILE USA, INC. (6529) | BKFDCA01X2X | 734 | — | — |
| 661-201 | 3 | Bakersfield: Main DA | Wireless | T-MOBILE USA, INC. (6529) | BKFDCA01X2X | 734 | — | — |
| 661-201 | 4 | Bakersfield: Main DA | Wireless | T-MOBILE USA, INC. (6529) | BKFDCA01X2X | 734 | — | — |
| 661-201 | 5 | Bakersfield: Main DA | Wireless | T-MOBILE USA, INC. (6529) | BKFDCA01X2X | 734 | — | — |
| 661-201 | 6 | Bakersfield: Main DA | Wireless | T-MOBILE USA, INC. (6529) | BKFDCA01X2X | 734 | — | — |
| 661-201 | 7 | Bakersfield: Main DA | Wireless | T-MOBILE USA, INC. (6529) | BKFDCA01X2X | 734 | — | — |
| 661-201 | 8 | Bakersfield: Main DA | Wireless | T-MOBILE USA, INC. (6529) | BKFDCA01X2X | 734 | — | — |
| 661-201 | 9 | Bakersfield: Main DA | Landline or VoIP | METROPCS, INC. (5562) | BKFDCA01X2X | 734 | — | — |
| 661-201 | A | Bakersfield: Main DA | Wireless | T-MOBILE USA, INC. (6529) | BKFDCA01X2X | 734 | — | — |
| 661-202 | 0 | Palmdale: Palmdale DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 661-202 | 1 | Palmdale: Palmdale DA | Landline or VoIP | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA (7718) | ONTARIO | 730 | — | — |
| 661-202 | 2 | Palmdale: Palmdale DA | Wireless | T-MOBILE USA, INC. (6529) | TRNECAGB7MD | 730 | — | — |
| 661-202 | 3 | Palmdale: Palmdale DA | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | ANAHEIM | 730 | — | — |
| 661-202 | 4 | Palmdale: Palmdale DA | Wireless | T-MOBILE USA, INC. (6529) | TRNECAGB7MD | 730 | — | — |
| 661-202 | 5 | Palmdale: Palmdale DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 661-202 | 6 | Palmdale: Palmdale DA | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 661-202 | 7 | Palmdale: Palmdale DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 661-202 | 8 | Palmdale: Palmdale DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 661-202 | 9 | Palmdale: Palmdale DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 661-202 | A | Palmdale: Palmdale DA | Landline or VoIP | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA (7718) | ONTARIO | 730 | — | — |
| 661-203 | A | Bakersfield: Main DA | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BKFDCAJAAMD | 734 | — | — |
| 661-204 | A | Bakersfield: Main DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BKFDCA018MD | 734 | — | — |
| 661-205 | A | Bakersfield: Main DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | BKFDCA018MD | 734 | — | — |
| 661-206 | 0 | Lancaster | Landline or VoIP | PAETEC ITEL, LLC (829J) | ANHMCANG4MD | 730 | — | — |
| 661-206 | 1 | Lancaster | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CA (8826) | LOS ANGELES | 730 | — | — |
| 661-206 | 2 | Lancaster | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LSANCA039MD | 730 | — | — |
| 661-206 | 3 | Lancaster | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | ANAHEIM | 730 | — | — |
| 661-206 | 4 | Lancaster | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | BLOOMINGTON | 730 | — | — |
| 661-206 | 5 | Lancaster | Landline or VoIP | TWC IP ENABLED SERVICES, LLC (793K) | SNMNCAXP2MD | 730 | — | — |
| 661-206 | 6 | Lancaster | Landline or VoIP | PAETEC ITEL, LLC (829J) | ANHMCANG4MD | 730 | — | — |
| 661-206 | 7 | Lancaster | Landline or VoIP | TWC IP ENABLED SERVICES, LLC (793K) | SNMNCAXP2MD | 730 | — | — |
| 661-206 | 8 | Lancaster | Landline or VoIP | TWC IP ENABLED SERVICES, LLC (793K) | SNMNCAXP2MD | 730 | — | — |
| 661-206 | 9 | Lancaster | Landline or VoIP | TWC IP ENABLED SERVICES, LLC (793K) | SNMNCAXP2MD | 730 | — | — |
| 661-206 | A | Lancaster | Landline or VoIP | PAETEC ITEL, LLC (829J) | ANHMCANG4MD | 730 | — | — |
| 661-207 | 0 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | UTILITY TELECOM GROUP, LLC - CA (9262) | LSANCARC80Z | 730 | — | — |
| 661-207 | 1 | Santa Clarita: Newhall-Castaic DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 661-207 | 2 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | UTILITY TELECOM GROUP, LLC - CA (9262) | LSANCARC80Z | 730 | — | — |
| 661-207 | 3 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | UTILITY TELECOM GROUP, LLC - CA (9262) | LSANCARC80Z | 730 | — | — |
| 661-207 | 4 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | UTILITY TELECOM GROUP, LLC - CA (9262) | LSANCARC80Z | 730 | — | — |
| 661-207 | 5 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | UTILITY TELECOM GROUP, LLC - CA (9262) | LSANCARC80Z | 730 | — | — |
| 661-207 | 6 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | UTILITY TELECOM GROUP, LLC - CA (9262) | LSANCARC80Z | 730 | — | — |
| 661-207 | 7 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | UTILITY TELECOM GROUP, LLC - CA (9262) | LSANCARC80Z | 730 | — | — |
| 661-207 | 8 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | UTILITY TELECOM GROUP, LLC - CA (9262) | LSANCARC80Z | 730 | — | — |
| 661-207 | 9 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | UTILITY TELECOM GROUP, LLC - CA (9262) | LSANCARC80Z | 730 | — | — |
| 661-207 | A | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | UTILITY TELECOM GROUP, LLC - CA (9262) | LSANCARC80Z | 730 | — | — |
| 661-208 | 0 | Palmdale: Palmdale DA | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 661-208 | 1 | Palmdale: Palmdale DA | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 661-208 | 2 | Palmdale: Palmdale DA | Wireless | T-MOBILE USA, INC. (6529) | TRNECAGB7MD | 730 | — | — |
| 661-208 | 3 | Palmdale: Palmdale DA | Landline or VoIP | ONVOY, LLC - CA (649C) | LOS ANGELES | 730 | — | — |
| 661-208 | 4 | Palmdale: Palmdale DA | Landline or VoIP | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (671J) | IRVNCASM1MD | 730 | — | — |
| 661-208 | 5 | Palmdale: Palmdale DA | Wireless | T-MOBILE USA, INC. (6529) | TRNECAGB7MD | 730 | — | — |
| 661-208 | 6 | Palmdale: Palmdale DA | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 661-208 | 7 | Palmdale: Palmdale DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-208 | 8 | Palmdale: Palmdale DA | Landline or VoIP | ONVOY, LLC - CA (649C) | LOS ANGELES | 730 | — | — |
| 661-208 | 9 | Palmdale: Palmdale DA | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 661-208 | A | Palmdale: Palmdale DA | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 661-209 | 0 | Palmdale: Agua Dulce DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-209 | 1 | Palmdale: Agua Dulce DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-209 | 2 | Palmdale: Agua Dulce DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-209 | 3 | Palmdale: Agua Dulce DA | Landline or VoIP | ONVOY, LLC - CA (649C) | LOS ANGELES | 730 | — | — |
| 661-209 | 4 | Palmdale: Agua Dulce DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-209 | 6 | Palmdale: Agua Dulce DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-209 | 7 | Palmdale: Agua Dulce DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-209 | 8 | Palmdale: Agua Dulce DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-209 | 9 | Palmdale: Agua Dulce DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-209 | A | Palmdale: Agua Dulce DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-210 | 0 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-210 | 1 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | IP HORIZON LLC (515J) | — | 730 | — | — |
| 661-210 | 2 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | IP HORIZON LLC (515J) | — | 730 | — | — |
| 661-210 | 3 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LSANCA039MD | 730 | — | — |
| 661-210 | 4 | Santa Clarita: Newhall-Castaic DA | Landline or VoIP | IP HORIZON LLC (515J) | — | 730 | — | — |
| 661-210 | 5 | Santa Clarita: Newhall-Castaic DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 661-210 | 6 | Santa Clarita: Newhall-Castaic DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 661-210 | 7 | Santa Clarita: Newhall-Castaic DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 661-210 | 8 | Santa Clarita: Newhall-Castaic DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 661-210 | 9 | Santa Clarita: Newhall-Castaic DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 661-210 | A | Santa Clarita: Newhall-Castaic DA | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 661-212 | 0 | Santa Clarita: Saugus Canyon Country DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-212 | 1 | Santa Clarita: Saugus Canyon Country DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-212 | 2 | Santa Clarita: Saugus Canyon Country DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-212 | 3 | Santa Clarita: Saugus Canyon Country DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-212 | 4 | Santa Clarita: Saugus Canyon Country DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-212 | 5 | Santa Clarita: Saugus Canyon Country DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-212 | 6 | Santa Clarita: Saugus Canyon Country DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-212 | 7 | Santa Clarita: Saugus Canyon Country DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-212 | 8 | Santa Clarita: Saugus Canyon Country DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
| 661-212 | 9 | Santa Clarita: Saugus Canyon Country DA | Landline or VoIP | METROPCS NETWORKS, LLC (899D) | TRNECAGB7MD | 730 | — | — |
Block-level assignments from the North American Numbering Plan administrator, via localcallingguide.com.
Assigned Prefixes
673
Assignment Blocks
5,715
Rate Centers
32
Carriers of Record
55
| Type | Blocks | Share |
|---|---|---|
| Landline | 695 | 12% |
| Landline or VoIP | 2,887 | 51% |
| Wireless | 2,133 | 37% |
| Carrier | Blocks |
|---|---|
| NEW CINGULAR WIRELESS PCS, LLC | 756 |
| ONVOY, LLC - CA | 723 |
| T-MOBILE USA, INC. | 683 |
| PACIFIC BELL | 599 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 546 |
| BANDWIDTH.COM CLEC, LLC - CA | 336 |
| METROPCS, INC. | 315 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 217 |
| METROPCS NETWORKS, LLC | 161 |
| UTILITY TELECOM GROUP, LLC - CA | 145 |
| 45 other carriers | 1,234 |
Carrier of record for each block. Numbers ported to another carrier keep their original block assignment, so this is not a lookup of who serves a given number today.
| Rate Center | Prefixes | Blocks |
|---|---|---|
| Bakersfield: Main DA | 151 | 1,240 |
| Palmdale: Palmdale DA | 96 | 791 |
| Santa Clarita: Newhall-Castaic DA | 67 | 493 |
| Lancaster | 55 | 453 |
| Bakersfield: South DA | 49 | 409 |
| Bakersfield: North DA | 29 | 243 |
| Santa Clarita: Saugus Canyon Country DA | 29 | 259 |
| Delano | 23 | 219 |
| Arvin | 22 | 222 |
| Edwards | 13 | 76 |
| Tehachapi | 13 | 126 |
| Taft | 11 | 113 |
| Mojave | 9 | 83 |
| Lebec | 8 | 77 |
| McFarland | 8 | 86 |
| Palmdale: Agua Dulce DA | 8 | 77 |
| Shafter | 8 | 75 |
| Wasco | 8 | 75 |
| Hi Vista | 7 | 58 |
| Lake Hughes | 7 | 68 |
| Rosamond | 7 | 63 |
| Big Butte | 6 | 59 |
| Earlimart | 6 | 64 |
| Palmdale: Leona Valley DA | 6 | 48 |
| Walker Basin | 5 | 42 |
| Buttonwillow | 4 | 33 |
| Berrenda Mesa | 3 | 24 |
| California Hot Springs | 3 | 27 |
| Cuyama | 3 | 32 |
| Glennville | 3 | 26 |
| Lost Hills | 3 | 29 |
| McKittrick | 3 | 25 |
A rate center is the telephone exchange area a number is homed to. It sets local calling boundaries, and is not the caller's current location.
Area code 661 is a North American Numbering Plan (NANP) telephone area code assigned to California, United States. It is one of 41 area codes serving California. As population and demand for phone numbers grew, the region was divided into multiple numbering plan areas to avoid exhausting the available 7-digit number pool.
Yes. 661 is an active North American Numbering Plan (NANP) area code, currently assigned to California, United States. It is safe to answer or dial calls using this area code.
Area code 661 covers 27 cities and communities in California, including Arvin, Bakersfield, Berrenda Mesa, Big Butte, Buttonwillow, and 22 more localities. This is based on telephone company rate center data — the geographic areas carriers use to determine local calling boundaries and to assign numbers when a business or individual requests a phone number in a specific city.
All numbers in the 661 area code observe Pacific Time (IANA timezone: America/Los_Angeles). Pacific Time is UTC−8 in winter (PST) and UTC−7 in summer (PDT). When placing a call to a 661 number from a different time zone, check the current local time above to avoid calling outside of business hours.
From within California, dial the 7-digit local number directly if calling within the same rate center, or dial 1 + 661 + 7-digit number for long-distance calls within North America. From outside the US or Canada, dial your country's international exit code followed by 1 661 XXX XXXX. The country code for both the United States and Canada in NANP is +1.
Format 661 numbers using E.164 notation as required by RFC 3966: prefix with +1 and omit dashes and parentheses (e.g., +16615550100). This format ensures tel: links work correctly on all mobile browsers and VoIP apps. See the tel: URI formatting guide for complete examples.