Where is area code 210?

Area code 210 is in Texas, in the United States: all 800 of its exchanges on record are there. From abroad it is dialled +1 210, then the seven-digit number.

Is a 210 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 210, 311 (39%) were allocated as mobile, 399 (50%) as fixed line, 75 (9%) as VoIP and 15 (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 210?

26 carriers hold exchanges in 210 on record; the most: AT&T (431), T-Mobile (106) and Verizon (94). 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 210 phone number?

In E.164 a 210 number matches ^\+1210[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 (210) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP.

210

Area code 210

Texas, United States

National (210) 555-0123, E.164 +12105550123

How the 800 central office codes (exchanges) of area code 210 were allocated, from the North American Numbering Plan's records: to which carrier, as which line type. A 210 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: TX
Exchanges on record: 800
Carriers on record: 26

Exchanges of 210 by the line type they were allocated as

Mobile 311 (39%)
Fixed line 399 (50%)
VoIP 75 (9%)
No line type on record 15 (2%)
800 exchanges on record

Most exchanges: AT&T 431, T-Mobile 106, Verizon 94.

Check a number

Valid fixed line or mobile number in the United States.

country code

210

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	+12105550123
International	+1 210-555-0123
National	(210) 555-0123
RFC 3966	tel:+1-210-555-0123

Source: North American Numbering Plan Administrator (NANPA); Canadian Numbering Administrator (CNAC); National numbering plan: United States (ITU)

The example is 210-555-0123: 555-0100 to 555-0199 are set aside for fictional use in every area code.

The exchange map

Every exchange of 210, by the line type it was allocated as

One cell per exchange: blocks 210 2xx to 210 9xx; in each block the row is the tens digit, the column the units digit.

Mobile 311
Fixed line 399
VoIP 75
No line type on record 15

Formats and patterns

E.164	+12105550123
International	+1 210-555-0123
National	(210) 555-0123
RFC 3966 (tel: URI)	tel:+1-210-555-0123

Any 210 number, in E.164

^\+1210[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 (311 on record)

^\+1210(?:2(?:0[2-59]|1[3-9]|3[28]|4[0135]|51|6[02469]|7[3-59]|8[4-9]|9[01])|3(?:0[0379]|1[3-9]|2[24-689]|3[06]|47|55|6[3-57]|7[134689]|8[0-35-79]|9[1-48])|4(?:[03][09]|1[02-689]|2[0-25-9]|4[0159]|5[249]|6[0148]|73|8[05])|5(?:0[0-258]|1[37]|35|4[0248]|5[0-379]|6[039]|7[3478]|8[49])|6(?:0[1-57-9]|1[238]|20|3[02689]|[49]3|6[03589]|8[359])|7(?:0[17-9]|1[0236-9]|2[2-8]|39|4[0146-9]|5[2-4]|6[0359]|7[1-36-9]|8[1246-9]|9[02379])|8(?:0[0379]|1[3589]|2[357]|3[1347]|4[02-46-9]|5[0-2479]|6[0-35-9]|7[0235]|8[04579]|9[4-7])|9(?:0[026-9]|1[2-57-9]|2[69]|3[15]|4[47]|5[2467]|6[2568]|7[015]|8[0346]|9[023578]))\d{4}$

Fixed line exchanges (399 on record)

^\+1210(?:2(?:0[016-8]|1[02]|2\d|3[013-79]|4[246-9]|5[03-9]|6[13578]|7[0-26-8]|8[0-3]|9[24-79])|3(?:0[124-68]|1[02]|2[0137]|3[1-579]|4[0-589]|5[0-46-9]|6[02689]|7[0257]|8[48]|9[05-79])|4(?:[04][2-46-8]|17|2[34]|3[1-8]|5[035-8]|6[235-7]|7[0-24-9]|8[1-4679]|9\d)|5(?:0[4679]|1[568]|2\d|3[0-4689]|4[135-79]|5[468]|6[124-8]|7[2569]|8[0-35-8]|9[0-35-9])|6(?:1[04-79]|2[1-9]|3[13-57]|4[014-9]|5\d|6[1267]|7[013-9]|8[0-2478]|9[0-24-9])|7(?:0[2-6]|15|2[01]|3[0-8]|4[35]|5[17]|6[246-8]|7[045]|8[035]|9[58])|8(?:0[1458]|1[024]|2[0-24689]|3[25689]|4[15]|5[568]|7[178]|8[1-368]|9[023])|9(?:[05]1|16|2[0-578]|3[0236-8]|4[569]|67|7[47-9]|8[79]|9[169]))\d{4}$

VoIP exchanges (75 on record)

^\+1210(?:29[38]|3(?:38|46|61)|4(?:0[15]|51|69|88)|5(?:03|1[0249]|37|7[01]|94)|6(?:0[06]|[47]2|64|86)|7(?:14|29|42|5[05689]|61|9[146])|8(?:0[26]|1[67]|30|53|64|7[469]|9[189])|9(?:0[3-5]|10|3[49]|4[0-38]|5[35]|6[01349]|7[23]|8[1258]|94))\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 210, with the exchanges allocated to it (the three digits after the area code).

Carrier	Exchanges	Mobile	Fixed line	VoIP	Exchanges held
AT&T	431	129	295	7	200–201, 206–209, 212–216, 218–220, 222–233, 235–236, 240–242, 244, 246, 250, 255–263, 265, 267, 270–272, 275–278, 281–284, 287–291, 294, 296–297, 299, 300, 302–304, 307–310, 315, 321–324, 330–335, 337, 340–346, 348–349, 351–360, 362, 366, 368–372, 374–375, 377, 384, 394, 396–398, 400, 402–404, 407–410, 412–416, 420, 422–423, 425, 427, 429–438, 440, 442–444, 449–452, 456, 458–465, 467, 470–472, 474–476, 478–483, 486–487, 489–499, 501–503, 505–509, 518, 520–525, 527–528, 530–534, 536, 541–543, 545, 550–552, 554, 557–558, 560–562, 564–567, 575, 578, 584–586, 588, 590–593, 595–597, 599, 601–602, 605, 609, 614–617, 619–628, 630, 633, 635, 637, 641, 644–662, 665–668, 670, 673–675, 677–682, 684, 687–692, 694–699, 701, 703–707, 709, 715–716, 718, 720, 730–738, 748–749, 751, 753, 758, 764–768, 770, 772, 776–779, 782–785, 787, 790, 799, 804–805, 815, 820–822, 824, 826–829, 832, 837, 840–841, 844, 848, 854, 856, 859–863, 865, 867, 871–872, 877, 882, 886, 890, 902, 909, 912–913, 918–919, 921–924, 927–928, 930–932, 936, 938, 943, 945–947, 949, 954, 957, 965, 967–968, 970–971, 973–974, 977–980, 983, 989–991, 994, 997–999
T-Mobile	106	106	0	0	204, 251, 264, 269, 273–274, 279, 286, 313, 316–318, 325–326, 336, 363–365, 367, 373, 378–379, 385–387, 389, 391–393, 418, 421, 445, 454, 473, 535, 544, 548, 559, 573–574, 577, 589, 618, 636, 638–639, 643, 663, 669, 683, 685, 708, 710, 717, 719, 723–726, 728, 739, 744, 763, 769, 771, 773, 786, 789, 797, 803, 809, 818, 825, 831, 833, 843, 847, 849, 852, 857, 873, 875, 880, 884–885, 887, 889, 894–895, 897, 900, 907–908, 914, 926, 929, 944, 956, 962, 966, 975, 984, 986, 992–993, 995
Verizon	94	54	40	0	202, 234, 238, 243, 245, 247–248, 253–254, 280, 301, 306, 314, 319, 327–328, 339, 347, 350, 376, 380–383, 388, 406, 419, 426, 428, 439, 441, 453, 468, 484–485, 500, 515–517, 526, 540, 556, 563, 568–569, 579, 587, 607–608, 610, 612, 632, 693, 722, 727, 740–741, 745, 760, 762, 774, 780–781, 788, 792–793, 795, 798, 801, 807, 810, 814, 819, 823, 834–836, 838–839, 842, 846, 850–851, 868, 870, 881, 883, 896, 906, 917, 935, 937, 951–952
Lumen	38	0	37	1	221, 237, 249, 268, 292, 295, 305, 312, 390, 395, 399, 417, 446, 466, 477, 504, 539, 546, 572, 581–583, 631, 640, 671, 676, 702, 757, 775, 808, 812, 855, 916, 920, 925, 961, 987, 996
Onvoy	37	0	0	37	293, 298, 361, 401, 405, 488, 512, 514, 519, 537, 594, 600, 606, 750, 755–756, 759, 761, 791, 796, 806, 817, 830, 853, 899, 903, 905, 934, 939, 941–942, 953, 963–964, 972, 982, 985
Bandwidth.com	18	0	0	18	338, 469, 510, 570–571, 642, 729, 802, 816, 864, 874, 876, 891, 904, 910, 960, 969, 988
USA Mobility	13	13	0	0	285, 513, 553, 603–604, 613, 713, 746–747, 752, 754, 813, 869
Paetec Itel	6	0	6	0	424, 538, 580, 721, 743, 901
Peerless Network	6	0	0	6	664, 672, 714, 794, 879, 981
Spectrum	6	0	6	0	455, 549, 598, 634, 845, 888
Tpx Communications	5	0	5	0	447–448, 457, 576, 933
American Messaging	4	4	0	0	203, 205, 217, 266
Astound Broadband	4	0	4	0	320, 547, 858, 878
Brightlink Communications	2	1	0	1	712, 898
Emergency Networks	2	2	0	0	329, 915
Foremost Telecommunications	2	0	2	0	239, 529
Tex-Link	2	0	2	0	892–893
Airespring	1	0	0	1	742
COMMIO LLC	1	0	0	1	955
CSC Wireless LLC	1	1	0	0	866
HD Carrier	1	0	0	1	940
IP Horizon	1	0	0	1	948
USFON INC	1	0	1	0	210
Vonage	1	0	0	1	686
Westel	1	0	1	0	629
Worldcall Interconnect	1	1	0	0	800

Questions developers ask

Where is area code 210?: Area code 210 is in Texas, in the United States: all 800 of its exchanges on record are there. From abroad it is dialled +1 210, then the seven-digit number.
Is a 210 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 210, 311 (39%) were allocated as mobile, 399 (50%) as fixed line, 75 (9%) as VoIP and 15 (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 210?: 26 carriers hold exchanges in 210 on record; the most: AT&T (431), T-Mobile (106) and Verizon (94). 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 210 phone number?: In E.164 a 210 number matches ^\+1210[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 (210) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP.