Arizona, United States
Mountain Time
11:23 PM
Area Code
623
State / Province
Arizona
Country
United States
Time Zone
Mountain Time
Area code 623 covers 1 city and community across Arizona, based on telephone company rate center data.
Use the E.164 format for clickable phone links (RFC 3966):
<a href="tel:+16235550100">+16235550100</a><a href="tel:+16235550199">+16235550199</a>Look up which exchange in Arizona a specific 623 number is homed to, and whether its block is wireline or wireless. See what a reverse lookup can establish before relying on the answer.
312 active prefixes in this area code, assigned as 2,542 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 2,542
| NPA-NXX | Block | Rate centre | Type | Carrier (OCN) | Switch | LATA | LIR | Dates |
|---|---|---|---|---|---|---|---|---|
| 623-200 | 0 | Phoenix | Landline or VoIP | ONVOY, LLC - AZ (630E) | PHOENIX | 666 | — | — |
| 623-200 | 1 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-200 | 2 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-200 | 3 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-200 | 4 | Phoenix | Landline or VoIP | ONVOY, LLC - AZ (630E) | PHOENIX | 666 | — | — |
| 623-200 | 5 | Phoenix | Landline or VoIP | ONVOY, LLC - AZ (630E) | PHOENIX | 666 | — | — |
| 623-200 | 6 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-200 | 7 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-200 | 8 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-200 | 9 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-200 | A | Phoenix | Landline or VoIP | ONVOY, LLC - AZ (630E) | PHOENIX | 666 | — | — |
| 623-201 | 0 | Phoenix | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | PHNXAZMAXMD | 666 | — | — |
| 623-201 | 1 | Phoenix | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | PHOENIX | 666 | — | — |
| 623-201 | 2 | Phoenix | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | PHOENIX | 666 | — | — |
| 623-201 | 3 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-201 | 4 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-201 | 5 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-201 | 6 | Phoenix | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | PHNXAZMAXMD | 666 | — | — |
| 623-201 | 7 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-201 | 8 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-201 | 9 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-201 | A | Phoenix | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | PHOENIX | 666 | — | — |
| 623-202 | 0 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-202 | 1 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-202 | 2 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-202 | 3 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-202 | 4 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-202 | 5 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-202 | 6 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-202 | 7 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-202 | 8 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-202 | 9 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-202 | A | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-203 | A | Phoenix | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | PHNXAZMAXMD | 666 | — | — |
| 623-204 | A | Phoenix | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | PHNXAZMAXMD | 666 | — | — |
| 623-205 | A | Phoenix | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | PHNXAZMAXMD | 666 | — | — |
| 623-206 | A | Phoenix | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | PHNXAZMAXMD | 666 | — | — |
| 623-207 | 0 | Phoenix | Landline | QWEST CORPORATION (9636) | DEER VALLEY NORTH | 666 | — | — |
| 623-207 | 1 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-207 | 2 | Phoenix | Landline | QWEST CORPORATION (9636) | DEER VALLEY NORTH | 666 | — | — |
| 623-207 | 3 | Phoenix | Landline | QWEST CORPORATION (9636) | COLDWATER | 666 | — | — |
| 623-207 | 4 | Phoenix | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | PHOENIX | 666 | — | — |
| 623-207 | 5 | Phoenix | Landline or VoIP | MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229) | PHOENIX | 666 | — | — |
| 623-207 | 6 | Phoenix | Landline or VoIP | PAETEC ITEL, LLC (829J) | PHNDAZLS1MD | 666 | — | — |
| 623-207 | 7 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-207 | 8 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-207 | 9 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-207 | A | Phoenix | Landline | QWEST CORPORATION (9636) | COLDWATER | 666 | — | — |
| 623-208 | 0 | Phoenix | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (6572) | PHNZAZZJAMD | 666 | — | — |
| 623-208 | 1 | Phoenix | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (6572) | PHNZAZZJAMD | 666 | — | — |
| 623-208 | 2 | Phoenix | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (6572) | PHNZAZZJAMD | 666 | — | — |
| 623-208 | 3 | Phoenix | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (6572) | PHNZAZZJAMD | 666 | — | — |
| 623-208 | 4 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-208 | 5 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-208 | 6 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-208 | 7 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-208 | 8 | Phoenix | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (6572) | PHNZAZZJAMD | 666 | — | — |
| 623-208 | 9 | Phoenix | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (6572) | PHNZAZZJAMD | 666 | — | — |
| 623-208 | A | Phoenix | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (6572) | PHNZAZZJAMD | 666 | — | — |
| 623-209 | 0 | Phoenix | Landline or VoIP | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (7175) | PHOENIX | 666 | — | — |
| 623-209 | 1 | Phoenix | Landline or VoIP | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (7175) | PHOENIX | 666 | — | — |
| 623-209 | 2 | Phoenix | Landline or VoIP | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (7175) | PHOENIX | 666 | — | — |
| 623-209 | 3 | Phoenix | Landline or VoIP | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (7175) | PHOENIX | 666 | — | — |
| 623-209 | 4 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-209 | 5 | Phoenix | Landline or VoIP | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (7175) | PHOENIX | 666 | — | — |
| 623-209 | 6 | Phoenix | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - AZ (587F) | PHNXAZMAXQX | 666 | — | — |
| 623-209 | 7 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-209 | 8 | Phoenix | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - AZ (3285) | PHOENIX | 666 | — | — |
| 623-209 | 9 | Phoenix | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ (6572) | PHNZAZZJAMD | 666 | — | — |
| 623-209 | A | Phoenix | Landline or VoIP | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (7175) | PHOENIX | 666 | — | — |
| 623-210 | 0 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-210 | 1 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-210 | 2 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-210 | 3 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-210 | 4 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-210 | 5 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-210 | 6 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-210 | 7 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-210 | 8 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-210 | 9 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-210 | A | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-212 | 0 | Phoenix | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | PHNXAZMAXMD | 666 | — | — |
| 623-212 | 1 | Phoenix | Landline or VoIP | RE-INVENT TELECOM, LLC - AZ (663G) | SCOTTSDALE | 666 | — | — |
| 623-212 | 2 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-212 | 3 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-212 | 4 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-212 | 5 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-212 | 6 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-212 | 7 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-212 | 8 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-212 | 9 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-212 | A | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-213 | 0 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-213 | 1 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-213 | 2 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-213 | 3 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-213 | 4 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-213 | 5 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-213 | 6 | Phoenix | Wireless | T-MOBILE USA, INC. (6529) | TEMPAZNR5MD | 666 | — | — |
| 623-213 | 7 | Phoenix | Landline or VoIP | COMCAST IP PHONE, LLC (318J) | PHNXAZMAX1Z | 666 | — | — |
Block-level assignments from the North American Numbering Plan administrator, via localcallingguide.com.
Assigned Prefixes
312
Assignment Blocks
2,542
Rate Centers
1
Carriers of Record
33
| Type | Blocks | Share |
|---|---|---|
| Landline | 323 | 13% |
| Landline or VoIP | 1,199 | 47% |
| Wireless | 1,020 | 40% |
| Carrier | Blocks |
|---|---|
| T-MOBILE USA, INC. | 521 |
| ONVOY, LLC - AZ | 381 |
| QWEST CORPORATION | 322 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 272 |
| COMCAST IP PHONE, LLC | 186 |
| NEW CINGULAR WIRELESS PCS, LLC | 161 |
| BANDWIDTH.COM CLEC, LLC - AZ | 127 |
| LEVEL 3 COMMUNICATIONS, LLC - AZ | 115 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 107 |
| METROPCS, INC. | 88 |
| 23 other carriers | 262 |
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 |
|---|---|---|
| Phoenix | 312 | 2,542 |
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 623 is a North American Numbering Plan (NANP) telephone area code assigned to Arizona, United States. It is one of 5 area codes serving Arizona. 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. 623 is an active North American Numbering Plan (NANP) area code, currently assigned to Arizona, United States. It is safe to answer or dial calls using this area code.
Area code 623 covers 1 city and community in Arizona, including Phoenix. 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 623 area code observe Mountain Time (IANA timezone: America/Denver). Mountain Time is UTC−7 in winter (MST) and UTC−6 in summer (MDT). When placing a call to a 623 number from a different time zone, check the current local time above to avoid calling outside of business hours.
From within Arizona, dial the 7-digit local number directly if calling within the same rate center, or dial 1 + 623 + 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 1 623 XXX XXXX. The country code for both the United States and Canada in NANP is +1.
Format 623 numbers using E.164 notation as required by RFC 3966: prefix with +1 and omit dashes and parentheses (e.g., +16235550100). This format ensures tel: links work correctly on all mobile browsers and VoIP apps. See the tel: URI formatting guide for complete examples.