951
Area code 951
California, United States
National (951) 555-0123, E.164 +19515550123
How the 710 central office codes (exchanges) of area code 951 were allocated, from the North American Numbering Plan's records: to which carrier, as which line type. A 951 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
- CA
- Exchanges on record
- 710
- Carriers on record
- 25
- Mobile 327 (46%)
- Fixed line 251 (35%)
- VoIP 118 (17%)
- No line type on record 14 (2%)
- 710 exchanges on record
Most exchanges: AT&T 166, T-Mobile 144, Verizon 113.
Check a number
Valid fixed line or mobile number in the United States.
+1
country code
951
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 | +19515550123 |
| International | +1 951-555-0123 |
| National | (951) 555-0123 |
| RFC 3966 | tel:+1-951-555-0123 |
Source: North American Numbering Plan Administrator (NANPA); Canadian Numbering Administrator (CNAC); National numbering plan: United States (ITU)
The example is 951-555-0123: 555-0100 to 555-0199 are set aside for fictional use in every area code.
The exchange map
One cell per exchange: blocks 951 2xx to 951 9xx; in each block the row is the tens digit, the column the units digit.
- Mobile 327
- Fixed line 251
- VoIP 118
- No line type on record 14
- Not on record 90
Formats and patterns
| E.164 | +19515550123 |
|---|---|
| International | +1 951-555-0123 |
| National | (951) 555-0123 |
| RFC 3966 (tel: URI) | tel:+1-951-555-0123 |
Any 951 number, in E.164
^\+1951[2-9]\d{6}$+1, the area code, a central office code that does not start with 0 or 1, then four digits.
Mobile exchanges (327 on record)
^\+1951(?:2(?:0[0-79]|1[02-46-9]|2[0479]|3[02-9]|4[019]|5[04589]|6[01459]|8[235-8]|9[457])|3(?:1[02-9]|23|3[01347]|4[579]|55|7[06-8]|8[0568]|9[125-8])|4(?:0[1358]|1[0458]|2[0-2568]|3[036-8]|4[0-25-8]|5\d|6[2-4679]|7[0235-8]|8[0-4]|9[6-8])|5(?:0[013-57]|1[357-9]|2[12569]|3[23689]|4[24-68]|5[01346-8]|6[014689]|7[03568]|8[013469]|9[0147-9])|6(?:0[4-68]|1[03679]|2[3479]|3[0245]|4[0-289]|6[02-467]|7[035]|9[0-2])|7(?:0[1-35-79]|1[2368]|2[28]|3[0-3]|4[1-3568]|5[1-4679]|6[0248]|7[1-35]|9[2-68])|8(?:0[2-579]|1[02-68]|2[23]|3[02-467]|4[027]|5[028]|[69]7|70)|9(?:0[1-7]|41|5[2-46]|6[1356]|7[023]|9[02]))\d{4}$Fixed line exchanges (251 on record)
^\+1951(?:2(?:08|15|2[2356]|31|4[2-8]|5[1367]|6[238]|7\d|8[0149]|9[689])|3(?:0[0-4689]|2[0-24-9]|3[28]|4[0-36]|5[1-489]|6[0-27-9]|7[1-359]|8[347]|9[039])|4(?:0[267]|1[239]|3[1245]|4[39]|6[18]|7[149]|8[5-9]|9[0-5])|5(?:0[689]|1[246]|2[0347]|3[0147]|4[1379]|52|6[357]|7[129]|8[278])|6(?:0[0-29]|3[7-9]|43|5[2-9]|65|7[1246-9]|8\d|9[3-9])|7(?:04|1[059]|2[37]|3[4-9]|49|5[05]|6[35-79]|7[04689]|8\d|9[017])|8(?:0[18]|17|2[46-8]|4[569]|80|9[2-48])|9(?:1[46]|2[2-9]|4[03]|55|68|77|81))\d{4}$VoIP exchanges (118 on record)
^\+1951(?:2(?:2[18]|52|6[67]|9[0-3])|3(?:0[57]|3[569]|4[48]|5[067]|6[3-6]|[79]4|8[129])|4(?:0[049]|1[67]|2[379]|[39]9|44|6[05])|5(?:02|28|[38]5|40|7[47]|9[2356])|6(?:0[37]|1[2458]|2[0-25]|3[136]|4[4-7]|51|6[89])|7(?:[05]8|[17]7|2[014-69]|4[04]|61|99)|8(?:0[06]|[19]9|2[0159]|35|4[48]|5[145]|66|7[578]|8[89])|9(?:[01]0|3[34]|4[246]|51|8[78]|9[89]))\d{4}$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 951, with the exchanges allocated to it (the three digits after the area code).
| Carrier | Exchanges | Mobile | Fixed line | VoIP | Exchanges held |
|---|---|---|---|---|---|
| AT&T | 166 | 76 | 88 | 2 | 200, 209, 222, 236–237, 248–249, 256, 258, 264–265, 270, 272–280, 288, 294, 310, 312–318, 320–321, 323, 325, 328, 333, 340–343, 351–354, 358–361, 369, 371–372, 388, 391, 395, 397, 408, 427, 429, 431, 434, 452, 455, 459, 467, 470, 472, 481, 483, 493, 495, 500, 507, 509, 512–514, 520–522, 539, 542, 549, 554, 558, 560, 568, 571–573, 582–584, 586, 589, 599, 602, 608, 617, 624, 637, 640, 642, 648, 655, 660, 680–689, 701, 710, 713, 715, 727, 730, 734–739, 743, 748, 750, 752–753, 755, 759–760, 764, 768, 774, 776, 778–782, 784–789, 794, 808, 812, 814, 817–818, 826–828, 850, 852, 898, 941, 955, 961 |
| T-Mobile | 144 | 144 | 0 | 0 | 207, 210, 213, 216, 219–220, 224, 227, 229–230, 232, 234, 239, 241, 250, 254, 259–261, 269, 283, 286, 334, 345, 347, 349, 355, 376–378, 380, 385–386, 405, 410, 418, 420–422, 425–426, 436–438, 441–442, 445–448, 450–451, 453–454, 456, 462–464, 475–477, 480, 482, 484, 497–498, 503, 515, 518–519, 525–526, 536, 538, 544–545, 548, 550–551, 557, 564, 570, 575–576, 578, 580–581, 594, 597–598, 604–605, 610, 613, 623, 627, 629, 632, 634–635, 641, 649, 662, 667, 670, 673, 691, 703, 705–707, 709, 712, 732, 742, 745, 756–757, 762, 771–773, 775, 792, 795–796, 802–804, 810, 822–823, 830, 832, 858, 867, 902, 905–907, 963, 965, 973, 992 |
| Verizon | 113 | 99 | 14 | 0 | 201–206, 212, 214, 217–218, 226, 233, 235, 238, 240, 255, 268, 282, 285, 287, 295, 297–299, 319, 329–331, 337, 370, 387, 392–393, 396, 398, 401, 403, 414–415, 428, 430, 433, 440, 457–458, 466, 468, 473, 478–479, 494, 496, 501, 505, 508, 516–517, 529, 532–533, 546, 553, 556, 561, 566, 569, 590–591, 606, 616, 630, 663–664, 666, 675, 690, 692, 702, 716, 718, 722, 728, 731, 733, 741, 746, 751, 754, 793, 805, 807, 809, 813, 815–816, 833–834, 836–837, 840, 842, 847, 870, 880, 892, 897, 901, 903, 956, 966, 970, 972, 990 |
| Frontier | 69 | 0 | 69 | 0 | 223, 242–247, 296, 301–304, 306, 308, 413, 443, 461, 471, 485–488, 490–492, 506, 587, 600–601, 609, 652–654, 656–659, 672, 674, 676–679, 693–699, 719, 763, 765–767, 769, 791, 845, 849, 914, 922, 924–929, 940, 943 |
| Onvoy | 47 | 0 | 0 | 47 | 267, 307, 336, 348, 356, 364, 389, 400, 404, 417, 499, 540, 592, 595, 612, 614, 618, 625, 631, 636, 647, 651, 669, 720–721, 725–726, 740, 744, 758, 761, 800, 806, 819–821, 825, 829, 835, 851, 854, 875, 900, 910, 951, 987, 999 |
| Lumen | 46 | 0 | 43 | 3 | 231, 251, 253, 257, 263, 271, 289, 324, 338–339, 363, 368, 373, 375, 383–384, 390, 402, 423, 435, 449, 474, 489, 523, 527, 537, 541, 543, 552, 565, 567, 579, 638–639, 643, 665, 704, 723, 770, 790, 801, 824, 846, 893, 968, 977 |
| Bandwidth.com | 32 | 0 | 0 | 32 | 221, 228, 290–293, 305, 335, 344, 374, 381–382, 394, 409, 416, 439, 444, 460, 465, 502, 585, 593, 596, 607, 615, 620–621, 708, 777, 848, 878, 888 |
| Spectrum | 18 | 0 | 18 | 0 | 208, 215, 225, 332, 379, 399, 406–407, 412, 419, 524, 534, 547, 563, 783, 797, 923, 981 |
| Fractel | 15 | 0 | 0 | 15 | 577, 622, 633, 644, 724, 844, 855, 866, 877, 889, 899, 933, 944, 946, 988 |
| Tpx Communications | 10 | 0 | 10 | 0 | 284, 300, 367, 432, 530–531, 588, 749, 894, 916 |
| Peerless Network | 5 | 0 | 0 | 5 | 266, 350, 357, 365–366 |
| Emergency Networks | 4 | 4 | 0 | 0 | 904, 952–954 |
| IP Horizon | 4 | 0 | 0 | 4 | 252, 603, 729, 934 |
| Pac-West Telecomm | 4 | 0 | 4 | 0 | 281, 326–327, 346 |
| COMMIO LLC | 3 | 0 | 0 | 3 | 645–646, 717 |
| Ton80 Communications | 3 | 0 | 0 | 3 | 668, 942, 998 |
| MCC Telephony | 2 | 0 | 2 | 0 | 309, 322 |
| Shelltel | 2 | 2 | 0 | 0 | 469, 619 |
| Utility Telephone | 2 | 0 | 2 | 0 | 362, 671 |
| Vonage | 2 | 0 | 0 | 2 | 528, 535 |
| American Messaging | 1 | 1 | 0 | 0 | 504 |
| Dish Wireless | 1 | 1 | 0 | 0 | 798 |
| HD Carrier | 1 | 0 | 0 | 1 | 799 |
| TELNYX | 1 | 0 | 0 | 1 | 574 |
| Wide Voice | 1 | 0 | 1 | 0 | 262 |
Questions developers ask
- Where is area code 951?
- Area code 951 is in California, in the United States: all 710 of its exchanges on record are there. From abroad it is dialled +1 951, then the seven-digit number.
- Is a 951 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 710 exchanges on record in 951, 327 (46%) were allocated as mobile, 251 (35%) as fixed line, 118 (17%) 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 951?
- 25 carriers hold exchanges in 951 on record; the most: AT&T (166), T-Mobile (144) and Verizon (113). 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 951 phone number?
- In E.164 a 951 number matches ^\+1951[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 (951) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP.