503
Area code 503
Oregon, United States
National (503) 555-0123, E.164 +15035550123
How the 800 central office codes (exchanges) of area code 503 were allocated, from the North American Numbering Plan's records: to which carrier, as which line type. A 503 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
- OR
- Exchanges on record
- 800
- Carriers on record
- 33
- Mobile 211 (26%)
- Fixed line 552 (69%)
- VoIP 21 (3%)
- No line type on record 16 (2%)
- 800 exchanges on record
Most exchanges: Lumen 292, Frontier 109, AT&T 105.
Check a number
Valid fixed line or mobile number in the United States.
+1
country code
503
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 | +15035550123 |
| International | +1 503-555-0123 |
| National | (503) 555-0123 |
| RFC 3966 | tel:+1-503-555-0123 |
Source: North American Numbering Plan Administrator (NANPA); Canadian Numbering Administrator (CNAC); National numbering plan: United States (ITU)
The example is 503-555-0123: 555-0100 to 555-0199 are set aside for fictional use in every area code.
The exchange map
One cell per exchange: blocks 503 2xx to 503 9xx; in each block the row is the tens digit, the column the units digit.
- Mobile 211
- Fixed line 552
- VoIP 21
- No line type on record 16
Formats and patterns
| E.164 | +15035550123 |
|---|---|
| International | +1 503-555-0123 |
| National | (503) 555-0123 |
| RFC 3966 (tel: URI) | tel:+1-503-555-0123 |
Any 503 number, in E.164
^\+1503[2-9]\d{6}$+1, the area code, a central office code that does not start with 0 or 1, then four digits.
Mobile exchanges (211 on record)
^\+1503(?:2(?:0[0-2489]|37|6[079]|7[18])|3(?:0[1279]|1[02-47-9]|2[09]|3[02-4]|4[17-9]|5[18]|6[79]|8[018]|96)|4(?:0[79]|[19]0|2[0-28]|[35]7|4[0269]|7[057]|81)|5(?:0[0-247-9]|1[04-69]|2[279]|39|4[45]|5[019]|6[089]|7[27]|8[03]|9[39])|6(?:0[24]|64|79|8[09])|7(?:0[1-689]|[13][09]|2[049]|4[01]|5[02-46-8]|8[0149]|9[139])|8(?:0[13-79]|1[026-9]|3[09]|4[179]|5[13]|6[03679]|7[0157]|8[01478]|9[0146])|9(?:0[134]|1[03-579]|2[016-9]|3[0-35689]|4[029]|5[13-7]|6[049]|7[05]|8[349]|9[01357-9]))\d{4}$Fixed line exchanges (552 on record)
^\+1503(?:2(?:0[357]|1[02-9]|[24589]\d|3[0-689]|6[1-68]|7[02-79])|3(?:0[03-68]|1[56]|2[1-8]|3[157-9]|4[02-6]|5[02-79]|6[1-68]|7\d|8[2-579]|9[0-57-9])|4(?:0[0-68]|1[2-9]|2[3-79]|[35][0-689]|4[13-578]|[68][02-9]|7[1-4689]|9[1-9])|5(?:0[56]|1[2378]|2[013-68]|3[0-8]|4[0236-9]|5[2-46-8]|6[1-467]|7[013-689]|8[124-9]|9[0-24-8])|6(?:0[0135-8]|1[02-9]|[2-59]\d|6[0-35-9]|7[0-8]|8[1-8])|7(?:07|[18][235-8]|2[1-35-8]|3[1-8]|4[235-9]|5[159]|[67]\d|9[024-8])|8(?:0[028]|1[3-5]|2\d|3[13-68]|4[02-68]|5[024-9]|6[12458]|7[2-4689]|8[23569]|9[27-9])|9(?:0[025-79]|16|2[2-5]|3[47]|4[13-8]|52|6[1-3578]|7[237-9]|8[0-2568]|9[26]))\d{4}$VoIP exchanges (21 on record)
^\+1503(?:206|3(?:[38]6|60)|461|5(?:03|65)|609|7[14]4|8(?:3[27]|9[35])|9(?:08|1[28]|66|[79]4|87))\d{4}$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 503, with the exchanges allocated to it (the three digits after the area code).
| Carrier | Exchanges | Mobile | Fixed line | VoIP | Exchanges held |
|---|---|---|---|---|---|
| Lumen | 292 | 0 | 292 | 0 | 203, 215–216, 219–236, 238–258, 261–262, 272–276, 279–289, 291–299, 304, 306, 315–316, 321–323, 325–326, 331, 335, 338–340, 342–346, 353–355, 361–366, 370–371, 373–379, 384, 390–393, 397–399, 400–402, 406, 408, 412–418, 423–425, 427, 436, 441, 450, 452, 455, 458–460, 463–464, 468, 471, 478–479, 482–483, 486–488, 493–494, 497, 499, 512–513, 523, 525, 528, 534, 536, 540, 543, 549, 552–553, 556–557, 563–564, 566, 571, 573, 576, 581, 584–585, 587–589, 592, 606, 608, 621, 623, 635–636, 647, 650, 652–657, 659, 675, 678, 694, 697, 699, 713, 715, 717, 721–723, 725, 727, 731–738, 742, 751, 755, 760–763, 768, 770–778, 782, 785–788, 790, 794–797, 813, 815, 822–823, 827–828, 831, 833, 836, 838, 840, 842–843, 850, 852, 855–858, 861–862, 865, 872, 876, 879, 882, 886, 892, 899, 909, 916, 934, 941, 944–945, 947–948, 952, 962–963, 965, 973, 977–978, 980–982, 986, 988 |
| Frontier | 109 | 0 | 109 | 0 | 259, 277, 350, 356–357, 359, 429, 431, 434–435, 439, 443, 453, 465–466, 469, 472, 474, 491–492, 520–521, 524, 526, 531, 533, 537–538, 547, 554, 558, 570, 574, 578–579, 582, 590–591, 596, 598, 603, 605, 612, 614–615, 617–618, 620, 622, 624–629, 638–646, 648–649, 658, 660–663, 665–674, 677, 681–682, 684–685, 690–693, 698, 728, 743, 749, 826, 835, 844, 846, 854, 864, 868, 873–874, 885, 897, 925, 968, 985, 992 |
| AT&T | 105 | 71 | 34 | 0 | 200, 208, 265, 268, 270, 308, 327, 329, 333, 367, 369, 372, 382–383, 385, 387–388, 395, 428, 430, 432, 438, 446–447, 451, 454, 462, 475, 484, 495, 498, 501, 506, 508, 510, 530, 535, 539, 550–551, 559, 568, 580, 676, 683, 686, 689, 701–706, 708–709, 719–720, 724, 739, 746–747, 765–766, 780–781, 784, 789, 791, 799, 801, 803–807, 816, 819, 825, 830, 839, 847, 860, 863, 866, 869, 875, 880–881, 887, 889, 913, 915, 919, 926, 928–929, 931, 933, 935, 946, 954, 960, 970, 989, 995 |
| Verizon | 83 | 54 | 29 | 0 | 201, 205, 207, 260, 264, 278, 290, 302–303, 305, 307, 310, 312–314, 318–320, 341, 347–349, 351, 389, 396, 403–405, 407, 419, 433, 440, 456–457, 473, 477, 502, 504, 507, 509, 522, 532, 545, 575, 577, 583, 593, 610, 613, 616, 679–680, 696, 707, 710, 712, 716, 729–730, 745, 758, 812, 820–821, 853, 867, 871, 877–878, 894, 896, 910, 922, 930, 936–937, 939, 949, 951, 953, 956, 964, 983 |
| T-Mobile | 64 | 63 | 1 | 0 | 209, 267, 269, 309, 317, 330, 332, 334, 358, 380–381, 409–410, 420–422, 437, 442, 449, 470, 481, 490, 515–516, 519, 544, 560, 569, 572, 602, 631, 664, 740–741, 750, 752–754, 756–757, 793, 809–810, 841, 849, 851, 884, 888, 890–891, 901, 914, 917, 927, 932, 957, 969, 975, 984, 990–991, 997–999 |
| Integra Telecom | 51 | 0 | 51 | 0 | 210, 212–214, 217–218, 328, 352, 444–445, 467, 476, 480, 485, 489, 496, 505, 517, 542, 546, 548, 561–562, 567, 586, 594–595, 597, 601, 607, 619, 688, 718, 726, 748, 764, 779, 783, 798, 802, 808, 814, 883, 905–907, 924, 943, 961, 967, 972 |
| USA Mobility | 22 | 22 | 0 | 0 | 202, 204, 237, 271, 301, 514, 527, 529, 599, 604, 817–818, 870, 903–904, 920–921, 938, 940, 942, 955, 993 |
| Onvoy | 13 | 0 | 0 | 13 | 206, 360, 386, 461, 503, 565, 744, 832, 837, 895, 918, 966, 994 |
| Astound Broadband | 6 | 0 | 6 | 0 | 600, 800, 900, 902, 979, 996 |
| Cascade Utilities | 5 | 0 | 5 | 0 | 337, 630, 637, 695, 834 |
| Comcast | 5 | 0 | 0 | 5 | 336, 908, 912, 974, 987 |
| Canby Telephone Association | 3 | 0 | 3 | 0 | 263, 266, 651 |
| Bandwidth.com | 2 | 0 | 0 | 2 | 609, 714 |
| Beaver Creek Telephone Company | 2 | 0 | 2 | 0 | 518, 898 |
| Molalla Communications Company | 2 | 0 | 2 | 0 | 759, 829 |
| SCTC | 2 | 0 | 2 | 0 | 767, 769 |
| Ziply Fiber | 2 | 0 | 2 | 0 | 324, 848 |
| Beaver Creek Cooperative Telephone | 1 | 0 | 1 | 0 | 632 |
| Colton Telephone Company | 1 | 0 | 1 | 0 | 824 |
| Eltopia Communications | 1 | 0 | 1 | 0 | 923 |
| Emergency Networks | 1 | 1 | 0 | 0 | 500 |
| Gervais Telephone | 1 | 0 | 1 | 0 | 792 |
| IP Horizon | 1 | 0 | 0 | 1 | 893 |
| Monitor Cooperative Telephone Company | 1 | 0 | 1 | 0 | 634 |
| Mt Angel Telephone Company | 1 | 0 | 1 | 0 | 845 |
| NEO SCS SCTC Long Distance | 1 | 0 | 1 | 0 | 448 |
| Nehalem Telecommunications | 1 | 0 | 1 | 0 | 368 |
| North County Communications | 1 | 0 | 1 | 0 | 426 |
| PTC | 1 | 0 | 1 | 0 | 859 |
| Pacific Wave Communications | 1 | 0 | 1 | 0 | 687 |
| Scio Mutual Telephone Association | 1 | 0 | 1 | 0 | 394 |
| Spectrum | 1 | 0 | 1 | 0 | 300 |
| St. Paul Cooperative Telephone Association | 1 | 0 | 1 | 0 | 633 |
Questions developers ask
- Where is area code 503?
- Area code 503 is in Oregon, in the United States: all 800 of its exchanges on record are there. From abroad it is dialled +1 503, then the seven-digit number.
- Is a 503 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 800 exchanges on record in 503, 211 (26%) were allocated as mobile, 552 (69%) as fixed line, 21 (3%) as VoIP and 16 (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 503?
- 33 carriers hold exchanges in 503 on record; the most: Lumen (292), Frontier (109) and AT&T (105). 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 503 phone number?
- In E.164 a 503 number matches ^\+1503[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 (503) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP.