California, United States
Pacific Time
7:03 AM
Area Code
858
State / Province
California
Country
United States
Time Zone
Pacific Time
Area code 858 covers 17 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:+18585550100">+18585550100</a><a href="tel:+18585550199">+18585550199</a>Look up which exchange in California a specific 858 number is homed to, and whether its block is wireline or wireless. See what a reverse lookup can establish before relying on the answer.
562 active prefixes in this area code, assigned as 4,648 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 4,648
| NPA-NXX | Block | Rate centre | Type | Carrier (OCN) | Switch | LATA | LIR | Dates |
|---|---|---|---|---|---|---|---|---|
| 858-200 | 0 | La Jolla | Landline or VoIP | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (671J) | SNDKCA882MD | 732 | — | — |
| 858-200 | 1 | La Jolla | Landline or VoIP | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (671J) | SNDKCA882MD | 732 | — | — |
| 858-200 | 2 | La Jolla | Landline or VoIP | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (671J) | SNDKCA882MD | 732 | — | — |
| 858-200 | 3 | La Jolla | Landline or VoIP | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (671J) | SNDKCA882MD | 732 | — | — |
| 858-200 | 4 | La Jolla | Landline or VoIP | PAETEC ITEL, LLC (829J) | SNDGCA0201Z | 732 | — | — |
| 858-200 | 5 | La Jolla | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SAN DIEGO | 732 | — | — |
| 858-200 | 6 | La Jolla | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SAN DIEGO | 732 | — | — |
| 858-200 | 7 | La Jolla | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA (7240) | SAN DIEGO | 732 | — | — |
| 858-200 | 8 | La Jolla | Landline or VoIP | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (671J) | SNDKCA882MD | 732 | — | — |
| 858-200 | 9 | La Jolla | Landline or VoIP | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (671J) | SNDKCA882MD | 732 | — | — |
| 858-200 | A | La Jolla | Landline or VoIP | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (671J) | SNDKCA882MD | 732 | — | — |
| 858-201 | 0 | San Diego: Mira Mesa DA | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | SNDICAETAMD | 732 | — | — |
| 858-201 | 1 | San Diego: Mira Mesa DA | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | SNDICAETAMD | 732 | — | — |
| 858-201 | 2 | San Diego: Mira Mesa DA | Landline or VoIP | ONVOY, LLC - CA (649C) | SAN DIEGO | 732 | — | — |
| 858-201 | 3 | San Diego: Mira Mesa DA | Landline or VoIP | ONVOY, LLC - CA (649C) | SAN DIEGO | 732 | — | — |
| 858-201 | 4 | San Diego: Mira Mesa DA | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CA (8826) | SAN DIEGO | 732 | — | — |
| 858-201 | 5 | San Diego: Mira Mesa DA | Landline or VoIP | ONVOY, LLC - CA (649C) | SAN DIEGO | 732 | — | — |
| 858-201 | 6 | San Diego: Mira Mesa DA | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CA (8826) | SAN DIEGO | 732 | — | — |
| 858-201 | 7 | San Diego: Mira Mesa DA | Landline or VoIP | ONVOY, LLC - CA (649C) | SAN DIEGO | 732 | — | — |
| 858-201 | 8 | San Diego: Mira Mesa DA | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-201 | 9 | San Diego: Mira Mesa DA | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-201 | A | San Diego: Mira Mesa DA | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CA (8826) | SAN DIEGO | 732 | — | — |
| 858-202 | 0 | La Jolla | Landline | PACIFIC BELL (9740) | SAN DIEGO REGENTS | 732 | — | — |
| 858-202 | 1 | La Jolla | Landline | PACIFIC BELL (9740) | SAN DIEGO REGENTS | 732 | — | — |
| 858-202 | 2 | La Jolla | Landline | PACIFIC BELL (9740) | SAN DIEGO REGENTS | 732 | — | — |
| 858-202 | 3 | La Jolla | Landline | PACIFIC BELL (9740) | SAN DIEGO REGENTS | 732 | — | — |
| 858-202 | 4 | La Jolla | Landline | PACIFIC BELL (9740) | SAN DIEGO REGENTS | 732 | — | — |
| 858-202 | 5 | La Jolla | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA (7240) | SAN DIEGO | 732 | — | — |
| 858-202 | 6 | La Jolla | Landline or VoIP | COMCAST PHONE OF CALIFORNIA, LLC (394L) | SNDGCA0268Z | 732 | — | — |
| 858-202 | 7 | La Jolla | Landline | PACIFIC BELL (9740) | SAN DIEGO REGENTS | 732 | — | — |
| 858-202 | 8 | La Jolla | Landline | PACIFIC BELL (9740) | SAN DIEGO REGENTS | 732 | — | — |
| 858-202 | 9 | La Jolla | Landline | PACIFIC BELL (9740) | SAN DIEGO REGENTS | 732 | — | — |
| 858-202 | A | La Jolla | Landline | PACIFIC BELL (9740) | SAN DIEGO REGENTS | 732 | — | — |
| 858-203 | 0 | La Jolla | Landline or VoIP | ONVOY, LLC - CA (649C) | SAN DIEGO | 732 | — | — |
| 858-203 | 1 | La Jolla | Landline or VoIP | ONVOY, LLC - CA (649C) | SAN DIEGO | 732 | — | — |
| 858-203 | 2 | La Jolla | Landline or VoIP | ONVOY, LLC - CA (649C) | SAN DIEGO | 732 | — | — |
| 858-203 | 3 | La Jolla | Landline or VoIP | TWC IP ENABLED SERVICES, LLC (793K) | SNDGCA0291Z | 732 | — | — |
| 858-203 | 4 | La Jolla | Landline or VoIP | COMCAST PHONE OF CALIFORNIA, LLC (394L) | SNDGCA0268Z | 732 | — | — |
| 858-203 | 5 | La Jolla | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | SNDICAETAMD | 732 | — | — |
| 858-203 | 6 | La Jolla | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CA (8826) | SAN DIEGO | 732 | — | — |
| 858-203 | 7 | La Jolla | Landline or VoIP | TWC IP ENABLED SERVICES, LLC (793K) | SNDGCA0291Z | 732 | — | — |
| 858-203 | 8 | La Jolla | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-203 | 9 | La Jolla | Landline or VoIP | ONVOY, LLC - CA (649C) | SAN DIEGO | 732 | — | — |
| 858-203 | A | La Jolla | Landline or VoIP | ONVOY, LLC - CA (649C) | SAN DIEGO | 732 | — | — |
| 858-204 | A | Poway | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | SNDICAETAMD | 732 | — | — |
| 858-205 | 0 | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-205 | 1 | Del Mar | Landline or VoIP | ONVOY, LLC - CA (649C) | SAN DIEGO | 732 | — | — |
| 858-205 | 2 | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-205 | 3 | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-205 | 4 | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-205 | 5 | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-205 | 6 | Del Mar | Landline or VoIP | ONVOY, LLC - CA (649C) | SAN DIEGO | 732 | — | — |
| 858-205 | 7 | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-205 | 8 | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-205 | 9 | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-205 | A | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-206 | 0 | Poway | Landline or VoIP | ONVOY, LLC - CA (649C) | SAN DIEGO | 732 | — | — |
| 858-206 | 1 | Poway | Landline or VoIP | TERRA NOVA TELECOM INC. (145J) | — | 732 | — | — |
| 858-206 | 2 | Poway | Landline or VoIP | ONVOY, LLC - CA (649C) | — | 732 | — | — |
| 858-206 | 8 | Poway | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | SNDGCA02XIZ | 732 | — | — |
| 858-206 | 9 | Poway | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | SNDGCA02XIZ | 732 | — | — |
| 858-206 | A | Poway | Landline or VoIP | ONVOY, LLC - CA (649C) | SAN DIEGO | 732 | — | — |
| 858-207 | 0 | Rancho Bernardo | Landline or VoIP | TELEPORT COMMUNICATIONS AMERICA, LLC - CA (7147) | SAN DIEGO | 732 | — | — |
| 858-207 | 1 | Rancho Bernardo | Landline or VoIP | TELEPORT COMMUNICATIONS AMERICA, LLC - CA (7147) | SAN DIEGO | 732 | — | — |
| 858-207 | 2 | Rancho Bernardo | Landline or VoIP | TELEPORT COMMUNICATIONS AMERICA, LLC - CA (7147) | SAN DIEGO | 732 | — | — |
| 858-207 | 3 | Rancho Bernardo | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CA (8826) | SAN DIEGO | 732 | — | — |
| 858-207 | 4 | Rancho Bernardo | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CA (8826) | SAN DIEGO | 732 | — | — |
| 858-207 | 5 | Rancho Bernardo | Landline or VoIP | TELEPORT COMMUNICATIONS AMERICA, LLC - CA (7147) | SAN DIEGO | 732 | — | — |
| 858-207 | 6 | Rancho Bernardo | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - CA (8826) | SAN DIEGO | 732 | — | — |
| 858-207 | 7 | Rancho Bernardo | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-207 | 8 | Rancho Bernardo | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-207 | 9 | Rancho Bernardo | Landline or VoIP | TELEPORT COMMUNICATIONS AMERICA, LLC - CA (7147) | SAN DIEGO | 732 | — | — |
| 858-207 | A | Rancho Bernardo | Landline or VoIP | TELEPORT COMMUNICATIONS AMERICA, LLC - CA (7147) | SAN DIEGO | 732 | — | — |
| 858-208 | 0 | Poway | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | SNDGCA02XIZ | 732 | — | — |
| 858-208 | 1 | Poway | Landline or VoIP | IP HORIZON LLC (515J) | — | 732 | — | — |
| 858-208 | 2 | Poway | Landline or VoIP | IP HORIZON LLC (515J) | — | 732 | — | — |
| 858-208 | 3 | Poway | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | SNDGCA02XIZ | 732 | — | — |
| 858-208 | 4 | Poway | Landline or VoIP | IP HORIZON LLC (515J) | — | 732 | — | — |
| 858-208 | 5 | Poway | Landline or VoIP | TERRA NOVA TELECOM INC. (145J) | — | 732 | — | — |
| 858-208 | 6 | Poway | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SAN DIEGO | 732 | — | — |
| 858-208 | 7 | Poway | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SAN DIEGO | 732 | — | — |
| 858-208 | 8 | Poway | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SAN DIEGO | 732 | — | — |
| 858-208 | 9 | Poway | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SAN DIEGO | 732 | — | — |
| 858-208 | A | Poway | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SAN DIEGO | 732 | — | — |
| 858-209 | 0 | Del Mar | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SAN DIEGO | 732 | — | — |
| 858-209 | 1 | Del Mar | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SAN DIEGO | 732 | — | — |
| 858-209 | 2 | Del Mar | Landline or VoIP | COMCAST PHONE OF CALIFORNIA, LLC (394L) | SNDGCA0268Z | 732 | — | — |
| 858-209 | 3 | Del Mar | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SAN DIEGO | 732 | — | — |
| 858-209 | 4 | Del Mar | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SAN DIEGO | 732 | — | — |
| 858-209 | 5 | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-209 | 6 | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-209 | 7 | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-209 | 8 | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-209 | 9 | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-209 | A | Del Mar | Wireless | T-MOBILE USA, INC. (6529) | ESCNCAKY2MD | 732 | — | — |
| 858-210 | 0 | La Jolla | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | SNDICAETAMD | 732 | — | — |
| 858-210 | 1 | La Jolla | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SAN DIEGO | 732 | — | — |
| 858-210 | 2 | La Jolla | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SAN DIEGO | 732 | — | — |
| 858-210 | 3 | La Jolla | Landline or VoIP | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (671J) | SNDKCA882MD | 732 | — | — |
| 858-210 | 4 | La Jolla | Landline or VoIP | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (671J) | SNDKCA882MD | 732 | — | — |
Block-level assignments from the North American Numbering Plan administrator, via localcallingguide.com.
Assigned Prefixes
562
Assignment Blocks
4,648
Rate Centers
19
Carriers of Record
44
| Type | Blocks | Share |
|---|---|---|
| Landline | 561 | 12% |
| Landline or VoIP | 2,593 | 56% |
| Wireless | 1,494 | 32% |
| Carrier | Blocks |
|---|---|
| ONVOY, LLC - CA | 648 |
| PACIFIC BELL | 561 |
| T-MOBILE USA, INC. | 529 |
| NEW CINGULAR WIRELESS PCS, LLC | 491 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 382 |
| BANDWIDTH.COM CLEC, LLC - CA | 240 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 228 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 226 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 200 |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 136 |
| 34 other carriers | 1,007 |
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 |
|---|---|---|
| La Jolla | 166 | 1,199 |
| San Diego: Linda Vista DA | 81 | 641 |
| San Diego: Mira Mesa DA | 69 | 640 |
| Del Mar | 45 | 372 |
| Poway | 45 | 340 |
| Rancho Bernardo | 41 | 307 |
| San Diego: San Diego DA | 23 | 238 |
| Rancho Penasquitos | 22 | 196 |
| Chula Vista | 18 | 196 |
| El Cajon | 14 | 150 |
| Rancho Santa Fe | 14 | 132 |
| La Mesa | 8 | 87 |
| National City | 5 | 53 |
| Coronado | 4 | 35 |
| Harbison-Alpine | 2 | 22 |
| Pine Valley | 2 | 12 |
| Campo | 1 | 11 |
| Dulzura | 1 | 9 |
| Jacumba | 1 | 8 |
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 858 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. 858 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 858 covers 17 cities and communities in California, including Campo, Chula Vista, Coronado, Del Mar, Dulzura, and 12 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 858 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 858 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 + 858 + 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 1 858 XXX XXXX. The country code for both the United States and Canada in NANP is +1.
Format 858 numbers using E.164 notation as required by RFC 3966: prefix with +1 and omit dashes and parentheses (e.g., +18585550100). This format ensures tel: links work correctly on all mobile browsers and VoIP apps. See the tel: URI formatting guide for complete examples.