520
Area code 520
Arizona, United States
National (520) 555-0123, E.164 +15205550123
How the 709 central office codes (exchanges) of area code 520 were allocated, from the North American Numbering Plan's records: to which carrier, as which line type. A 520 number is mobile, fixed line or VoIP according to its exchange, the three digits after the area code; the allocation is the original one (below).
At a glance
- Country code
- +1
- State
- AZ
- Exchanges on record
- 709
- Carriers on record
- 43
- Mobile 262 (37%)
- Fixed line 318 (45%)
- VoIP 115 (16%)
- No line type on record 14 (2%)
- 709 exchanges on record
Most exchanges: Lumen 233, Verizon 131, T-Mobile 95.
Check a number
Valid fixed line or mobile number in the United States.
+1
country code
520
area code
5550123
subscriber number
| Country | United States numbering plan |
|---|---|
| Line type | Fixed line or mobile |
| Carrier the block was allocated to | No carrier on record for this prefix |
| E.164 | +15205550123 |
| International | +1 520-555-0123 |
| National | (520) 555-0123 |
| RFC 3966 | tel:+1-520-555-0123 |
Source: North American Numbering Plan Administrator (NANPA); Canadian Numbering Administrator (CNAC); National numbering plan: United States (ITU)
The example is 520-555-0123: 555-0100 to 555-0199 are set aside for fictional use in every area code.
The exchange map
One cell per exchange: blocks 520 2xx to 520 9xx; in each block the row is the tens digit, the column the units digit.
- Mobile 262
- Fixed line 318
- VoIP 115
- No line type on record 14
- Not on record 91
Formats and patterns
| E.164 | +15205550123 |
|---|---|
| International | +1 520-555-0123 |
| National | (520) 555-0123 |
| RFC 3966 (tel: URI) | tel:+1-520-555-0123 |
Any 520 number, in E.164
^\+1520[2-9]\d{6}$+1, the area code, a central office code that does not start with 0 or 1, then four digits.
Mobile exchanges (262 on record)
^\+1520(?:2(?:1[36]|2[017]|3[04-8]|4[0-2457-9]|5[0-35-7]|6[024-689]|7[0-589]|8[023689])|3(?:0[0-24-9]|1[023]|3[0-2469]|4[03-59]|5[489]|6[057]|7[0136]|8[069]|9[026])|4(?:0[0-69]|19|2[57-9]|3[15]|4[013-69]|5[013]|6[05]|7[013-59]|8[1-468]|9[0169])|5(?:0[478]|1[078]|28|3[459]|4[1389]|5[13469]|6[015]|8[057]|9[01689])|6(?:0[1-4679]|1[039]|27|3[1-57]|4[359]|5[168]|6[018]|7[5-9]|86|9[78])|7(?:0[1459]|10|2[7-9]|3[024-689]|5[2-4679]|6[3-57]|8[0389])|8(?:08|2[07]|3[1349]|4[0189]|[57]0|6[0179]|91)|9(?:0[4679]|12|21|40|5[45]|65|7[1579]|8[0-278]|9[013]))\d{4}$Fixed line exchanges (318 on record)
^\+1520(?:2(?:0[0-689]|1[257-9]|2[2-689]|3[29]|4[36]|5[489]|67|8[1457]|9\d)|3(?:1[4-689]|2\d|3[37]|5[0-267]|6[1-4689]|7[4578]|8[1-578]|9[1347-9])|4(?:0[78]|1[03-578]|2[1-46]|3[02-479]|5[24-9]|6[13469]|7[278]|8[79]|9[3-58])|5(?:0[59]|1[2-69]|29|3[138]|4[24-7]|5[08]|6[268]|7\d|8[2469]|94)|6(?:1[5-8]|2[0-689]|38|4[0278]|5[29]|6[2-579]|7[0-4]|8[12479]|9[0-6])|7(?:0[6-8]|1[2-8]|2[0-5]|3[137]|[49]\d|5[01]|6[0-26]|7[07]|8[45])|8(?:0[1-35-79]|18|2[2-69]|3[6-8]|4[57]|5[1-58]|6[68]|7[2-46-9]|8\d|9[568])|9(?:0[138]|1[78]|2[24]|4[1-5]|89))\d{4}$VoIP exchanges (115 on record)
^\+1520(?:2(?:07|1[04]|[36][13]|7[67])|3(?:03|17|3[58]|4[126-8]|5[35]|7[29]|95)|4(?:1[26]|20|3[68]|[46][278]|76|85|9[27])|5(?:0[0-36]|2[0-7]|3[0267]|40|5[27]|6[3479]|8[138]|9[2357])|6(?:0[058]|1[24]|3[069]|4[146]|5[03-57]|66|8[0358]|99)|7(?:0[23]|19|5[58]|7[1259])|8(?:00|1[25]|4[2-4]|99)|9(?:[01]0|[24]9|34|66|9[49]))\d{4}$The exchange patterns follow the original allocations; a number ported since keeps its digits but not necessarily its carrier or its line type.
Carriers and their exchanges
Every carrier holding exchanges in 520, with the exchanges allocated to it (the three digits after the area code).
| Carrier | Exchanges | Mobile | Fixed line | VoIP | Exchanges held |
|---|---|---|---|---|---|
| Lumen | 233 | 0 | 230 | 3 | 202, 205–206, 208–209, 217–219, 222–223, 225–226, 228–229, 232, 243, 246, 254, 258, 281, 285, 287, 290–299, 314, 316, 318–328, 337, 348, 351, 356–357, 363–364, 366, 368–369, 374–375, 377–378, 382, 384–385, 388, 393–394, 397–399, 407–408, 410, 413–414, 417, 421, 423–424, 426, 432–434, 439, 452, 454–459, 463–464, 466, 469, 472, 487, 489, 494–495, 498, 509, 512–516, 519, 529, 531, 533, 538, 542, 544–547, 566, 568, 570–579, 582, 584, 586, 589, 595, 615–618, 620–626, 628–629, 638–640, 647–648, 652, 662–665, 670, 681–682, 689–690, 694–696, 712, 720–724, 731, 733, 740–751, 760–762, 770, 777, 784, 790–795, 797–799, 803, 805–807, 818, 822, 825, 829, 836, 838, 858, 866, 868, 872–874, 876–889, 895–896, 901, 903, 908 |
| Verizon | 131 | 104 | 27 | 0 | 203, 216, 221, 230, 235, 237, 240, 242, 253, 255, 260, 262, 264, 268–269, 279, 282, 284, 289, 300, 305–307, 310, 330, 333–334, 340, 343, 345, 349, 354, 396, 400, 403–405, 419, 425, 429, 437, 444, 449, 451, 453, 471, 477, 483, 488, 490, 496, 507–508, 517, 528, 539, 541, 549, 559, 561, 590–591, 601, 603–604, 609–610, 627, 632–633, 643, 645, 649, 651, 656, 668–669, 671–674, 676, 678–679, 684, 686–687, 691–693, 697–698, 705–709, 713–718, 725, 729–730, 732, 734, 738, 752–754, 759, 780, 820, 827, 833, 840, 849–850, 860, 904, 909, 917–918, 954–955, 975, 987–988, 993 |
| T-Mobile | 95 | 95 | 0 | 0 | 213, 220, 227, 234, 236, 238, 244–245, 248–252, 256–257, 265–266, 270–271, 274, 278, 280, 283, 286, 313, 331–332, 359, 365, 370–371, 373, 376, 380, 390, 401–402, 427, 435, 440, 443, 450, 460, 470, 473–474, 479, 481, 491, 499, 504, 534–535, 543, 553, 556, 585, 596, 598, 606, 619, 631, 634–635, 637, 658, 660–661, 701, 728, 757, 763–765, 783, 788–789, 831, 839, 848, 861, 869–870, 891, 921, 940, 965, 971, 977, 979–982, 990–991 |
| AT&T | 68 | 53 | 15 | 0 | 239, 241, 247, 272–273, 275, 288, 301–302, 304, 308–309, 312, 329, 336, 339, 344, 358, 360, 386, 389, 392, 406, 409, 422, 428, 431, 441, 445, 465, 478, 482, 486, 510, 518, 548, 551, 554, 560, 565, 587, 599, 607, 613, 704, 727, 735–736, 756, 767, 808, 834, 837, 841, 851–855, 867, 906–907, 912, 941–945 |
| Onvoy | 47 | 0 | 0 | 47 | 210, 214, 233, 277, 303, 317, 338, 342, 353, 379, 436, 438, 447, 462, 467–468, 500, 502–503, 506, 520, 523–525, 527, 530, 532, 536, 552, 593, 597, 600, 608, 614, 630, 650, 666, 680, 683, 702, 800, 842–844, 900, 910, 999 |
| Bandwidth.com | 17 | 0 | 0 | 17 | 231, 261, 276, 355, 442, 485, 497, 540, 605, 612, 653, 657, 719, 775, 779, 812, 815 |
| Allstream | 10 | 0 | 10 | 0 | 200–201, 224, 352, 381, 391, 461, 505, 924, 989 |
| Fractel | 10 | 0 | 0 | 10 | 522, 588, 644, 655, 688, 699, 755, 758, 899, 966 |
| Comcast | 7 | 0 | 0 | 7 | 207, 263, 335, 372, 395, 492, 685 |
| Gila River Telecommunications | 7 | 0 | 7 | 0 | 215, 315, 418, 430, 550, 562, 796 |
| IP Horizon | 7 | 0 | 0 | 7 | 537, 563–564, 567, 569, 581, 583 |
| Ton80 Communications | 7 | 0 | 0 | 7 | 641, 646, 772, 929, 934, 949, 994 |
| Valley Telephone Cooperative | 6 | 0 | 6 | 0 | 558, 642, 824, 826, 845, 847 |
| Emergency Networks | 5 | 5 | 0 | 0 | 367, 580, 602, 710, 739 |
| Peerless Network | 4 | 0 | 0 | 4 | 346, 412, 448, 636 |
| COMMIO LLC | 3 | 0 | 0 | 3 | 526, 557, 654 |
| TELNYX | 3 | 0 | 0 | 3 | 341, 347, 592 |
| Tohono O'Odham Utility Authority | 3 | 0 | 3 | 0 | 361–362, 383 |
| Allo Communications | 2 | 0 | 2 | 0 | 737, 785 |
| Brightlink Communications | 2 | 1 | 0 | 1 | 476, 484 |
| Dish Wireless | 2 | 2 | 0 | 0 | 675, 677 |
| HD Carrier | 2 | 0 | 0 | 2 | 420, 521 |
| Midvale Telephone Exchange | 2 | 0 | 2 | 0 | 212, 898 |
| North County Communications | 2 | 0 | 2 | 0 | 259, 267 |
| Nuso | 2 | 0 | 2 | 0 | 659, 667 |
| Ahoi | 1 | 0 | 1 | 0 | 922 |
| CSC Wireless LLC | 1 | 1 | 0 | 0 | 475 |
| Callworks Corporation | 1 | 0 | 0 | 1 | 703 |
| Exiant | 1 | 0 | 0 | 1 | 416 |
| FirstDigital | 1 | 0 | 1 | 0 | 493 |
| Gila Local Exchange Carrier | 1 | 0 | 1 | 0 | 350 |
| Leap Telecom | 1 | 0 | 1 | 0 | 802 |
| Mcc Telephony | 1 | 0 | 1 | 0 | 415 |
| Paetec Itel | 1 | 0 | 1 | 0 | 204 |
| TDS Telecom | 1 | 0 | 1 | 0 | 823 |
| Table Top Telephone Company | 1 | 0 | 1 | 0 | 387 |
| Twilio International | 1 | 0 | 0 | 1 | 501 |
| USA Mobility | 1 | 1 | 0 | 0 | 446 |
| Valley Connections | 1 | 0 | 1 | 0 | 766 |
| Vonage | 1 | 0 | 0 | 1 | 771 |
| Wavenation | 1 | 0 | 1 | 0 | 594 |
| West Telecom | 1 | 0 | 1 | 0 | 809 |
| Wide Voice | 1 | 0 | 1 | 0 | 801 |
Questions developers ask
- Where is area code 520?
- Area code 520 is in Arizona, in the United States: all 709 of its exchanges on record are there. From abroad it is dialled +1 520, then the seven-digit number.
- Is a 520 number mobile or landline?
- Either: in the North American Numbering Plan the line type belongs to the exchange (the three digits after the area code), not to the area code. Of the 709 exchanges on record in 520, 262 (37%) were allocated as mobile, 318 (45%) as fixed line, 115 (16%) as VoIP and 14 (2%) have no line type on record. A number can have been ported since, to another carrier and even to another line type.
- Which carriers have numbers in area code 520?
- 43 carriers hold exchanges in 520 on record; the most: Lumen (233), Verizon (131) and T-Mobile (95). These are the original allocations: with number portability, a number may be served by another carrier today, which only a live carrier lookup (an HLR or MNP query) can tell.
- How do I validate a 520 phone number?
- In E.164 a 520 number matches ^\+1520[2-9]\d{6}$: +1, the area code, a central office code that does not start with 0 or 1, then four digits. Written nationally it reads (520) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP.