California, United States
Pacific Time
10:23 PM
Area Code
840
State / Province
California
Country
United States
Time Zone
Pacific Time
Area code 840 covers 19 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:+18405550100">+18405550100</a><a href="tel:+18405550199">+18405550199</a>Look up which exchange in California a specific 840 number is homed to, and whether its block is wireline or wireless. See what a reverse lookup can establish before relying on the answer.
126 active prefixes in this area code, assigned as 1,319 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 1,319
| NPA-NXX | Block | Rate centre | Type | Carrier (OCN) | Switch | LATA | LIR | Dates |
|---|---|---|---|---|---|---|---|---|
| 840-200 | 0 | Chino | Landline or VoIP | FRACTEL, LLC (965H) | LSANCAJWIMD | 730 | — | — |
| 840-200 | 1 | Chino | Landline or VoIP | TELNYX LLC (073H) | LSANCARC32Z | 730 | — | — |
| 840-200 | 2 | Chino | Landline or VoIP | FRACTEL, LLC (965H) | LSANCAJWIMD | 730 | — | — |
| 840-200 | 3 | Chino | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 840-200 | 4 | Chino | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-200 | 5 | Chino | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-200 | 6 | Chino | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-200 | 7 | Chino | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-200 | 8 | Chino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-200 | 9 | Chino | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LNBHCAXPXQX | 730 | — | — |
| 840-200 | A | Chino | Landline or VoIP | FRACTEL, LLC (965H) | LSANCAJWIMD | 730 | — | — |
| 840-201 | 0 | Fontana | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 840-201 | 1 | Fontana | Landline or VoIP | ONVOY, LLC - CA (649C) | LOS ANGELES | 730 | — | — |
| 840-201 | 2 | Fontana | Wireless | ONVOY SPECTRUM, LLC (624H) | LSANCA03GMD | 730 | — | — |
| 840-201 | 3 | Fontana | Landline or VoIP | ONVOY, LLC - CA (649C) | LOS ANGELES | 730 | — | — |
| 840-201 | 4 | Fontana | Landline or VoIP | ONVOY, LLC - CA (649C) | LOS ANGELES | 730 | — | — |
| 840-201 | 5 | Fontana | Landline or VoIP | ONVOY, LLC - CA (649C) | LOS ANGELES | 730 | — | — |
| 840-201 | 6 | Fontana | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 840-201 | 7 | Fontana | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 840-201 | 8 | Fontana | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 840-201 | 9 | Fontana | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-201 | A | Fontana | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-202 | 0 | Pomona | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-202 | 1 | Pomona | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-202 | 2 | Pomona | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-202 | 3 | Pomona | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-202 | 4 | Pomona | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-202 | 5 | Pomona | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-202 | 6 | Pomona | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-202 | 7 | Pomona | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-202 | 8 | Pomona | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-202 | 9 | Pomona | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-202 | A | Pomona | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-203 | 0 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-203 | 1 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-203 | 2 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-203 | 3 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-203 | 4 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-203 | 5 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-203 | 6 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-203 | 7 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-203 | 8 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-203 | 9 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-203 | A | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-204 | 0 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-204 | 1 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-204 | 2 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-204 | 3 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-204 | 4 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-204 | 5 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-204 | 6 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-204 | 7 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-204 | 8 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-204 | 9 | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-204 | A | San Bernardino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-205 | 0 | Claremont-San Dimas | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LNBHCAXPXQX | 730 | — | — |
| 840-205 | 1 | Claremont-San Dimas | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LNBHCAXPXQX | 730 | — | — |
| 840-205 | 2 | Claremont-San Dimas | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 840-205 | 3 | Claremont-San Dimas | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LNBHCAXPXQX | 730 | — | — |
| 840-205 | 4 | Claremont-San Dimas | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LNBHCAXPXQX | 730 | — | — |
| 840-205 | 5 | Claremont-San Dimas | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-205 | 6 | Claremont-San Dimas | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-205 | 7 | Claremont-San Dimas | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-205 | 8 | Claremont-San Dimas | Landline or VoIP | ONVOY, LLC - CA (649C) | COVNCAXFX3Y | 730 | — | — |
| 840-205 | 9 | Claremont-San Dimas | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-205 | A | Claremont-San Dimas | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LNBHCAXPXQX | 730 | — | — |
| 840-206 | 0 | Chino | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LNBHCAXPXQX | 730 | — | — |
| 840-206 | 1 | Chino | Wireless | ONVOY SPECTRUM, LLC (624H) | COVNCAXFX2Y | 730 | — | — |
| 840-206 | 2 | Chino | Wireless | ONVOY SPECTRUM, LLC (624H) | COVNCAXFX2Y | 730 | — | — |
| 840-206 | 3 | Chino | Wireless | ONVOY SPECTRUM, LLC (624H) | COVNCAXFX2Y | 730 | — | — |
| 840-206 | 4 | Chino | Wireless | ONVOY SPECTRUM, LLC (624H) | COVNCAXFX2Y | 730 | — | — |
| 840-206 | 5 | Chino | Wireless | ONVOY SPECTRUM, LLC (624H) | COVNCAXFX2Y | 730 | — | — |
| 840-206 | 6 | Chino | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LNBHCAXPXQX | 730 | — | — |
| 840-206 | 7 | Chino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-206 | 8 | Chino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-206 | 9 | Chino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-206 | A | Chino | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | RIVERSIDE | 730 | — | — |
| 840-207 | 0 | Arrowhead | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-207 | 1 | Arrowhead | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-207 | 2 | Arrowhead | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-207 | 3 | Arrowhead | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-207 | 4 | Arrowhead | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-207 | 5 | Arrowhead | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-207 | 6 | Arrowhead | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-207 | 7 | Arrowhead | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-207 | 8 | Arrowhead | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-207 | 9 | Arrowhead | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-207 | A | Arrowhead | Wireless | T-MOBILE USA, INC. (6529) | RVSDCAYAGT1 | 730 | — | — |
| 840-208 | 0 | Claremont-San Dimas | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LNBHCAXPXQX | 730 | — | — |
| 840-208 | 1 | Claremont-San Dimas | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LNBHCAXPXQX | 730 | — | — |
| 840-208 | 2 | Claremont-San Dimas | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LNBHCAXPXQX | 730 | — | — |
| 840-208 | 3 | Claremont-San Dimas | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 840-208 | 4 | Claremont-San Dimas | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 840-208 | 5 | Claremont-San Dimas | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 840-208 | 6 | Claremont-San Dimas | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 840-208 | 7 | Claremont-San Dimas | Landline or VoIP | TELNYX LLC (073H) | LSANCARC32Z | 730 | — | — |
| 840-208 | 8 | Claremont-San Dimas | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 840-208 | 9 | Claremont-San Dimas | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | BLTNCAADGMD | 730 | — | — |
| 840-208 | A | Claremont-San Dimas | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | LNBHCAXPXQX | 730 | — | — |
| 840-209 | 1 | Arrowhead | Landline or VoIP | TELNYX LLC (073H) | LSANCARC32Z | 730 | — | — |
Block-level assignments from the North American Numbering Plan administrator, via localcallingguide.com.
Assigned Prefixes
126
Assignment Blocks
1,319
Rate Centers
19
Carriers of Record
20
| Type | Blocks | Share |
|---|---|---|
| Landline or VoIP | 516 | 39% |
| Wireless | 803 | 61% |
| Carrier | Blocks |
|---|---|
| NEW CINGULAR WIRELESS PCS, LLC | 280 |
| T-MOBILE USA, INC. | 277 |
| ONVOY, LLC - CA | 276 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 193 |
| COMMIO, LLC | 65 |
| FRACTEL, LLC | 59 |
| BANDWIDTH.COM CLEC, LLC - CA | 46 |
| ONVOY SPECTRUM, LLC | 44 |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 22 |
| TELNYX LLC | 19 |
| 10 other carriers | 38 |
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 |
|---|---|---|
| Pomona | 16 | 175 |
| Arrowhead | 14 | 143 |
| San Bernardino | 14 | 154 |
| Fontana | 12 | 129 |
| Chino | 8 | 86 |
| Claremont-San Dimas | 8 | 84 |
| Ontario | 7 | 74 |
| Upland | 7 | 72 |
| Colton | 6 | 62 |
| Highland | 5 | 53 |
| Marshall | 5 | 50 |
| Redlands | 5 | 55 |
| Rialto | 5 | 52 |
| Diamond Bar | 4 | 38 |
| Calimesa | 3 | 32 |
| Etiwanda | 3 | 25 |
| Mentone | 2 | 16 |
| Big Bear City | 1 | 11 |
| Crestline | 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 840 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. 840 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 840 covers 19 cities and communities in California, including Arrowhead, Big Bear City, Calimesa, Chino, Claremont-San Dimas, and 14 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 840 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 840 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 + 840 + 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 1 840 XXX XXXX. The country code for both the United States and Canada in NANP is +1.
Format 840 numbers using E.164 notation as required by RFC 3966: prefix with +1 and omit dashes and parentheses (e.g., +18405550100). This format ensures tel: links work correctly on all mobile browsers and VoIP apps. See the tel: URI formatting guide for complete examples.