| Regional Office | Call Board Landline Tel No. | Call Board Mobile No. | Call Board e-mail id |
| Ahmedabad | (079) - 26443102 / 07/ 08 | 98-980-84061 | ccguj@hcl.in |
| Bangalore | (080) - 25584522/624/426 | 99-800-80138 | rrcblr@hcl.in |
| Bhopal | (0755) - 2469197/198 | 98-936-90414 99-815-00904 |
callbrd@hcl.in |
| Bhubaneswar | (0674) - 2535353 / 2535343/2531318 | 99-370-85131 | bbsrcall@hcl.in |
| Chandigarh | (0172) - 2708088 | 98-765-02501 98-765-02502 |
hclchdcc@hcl.in |
| Chennai | (044) - 28291243 (3 lines) with Hunting | cbchen@hcl.in | |
| Coimbatore | (0422) - 221-3619 / 221-3620 / 2213621 | 98-942-91320 | cbssocal@hcl.in |
| Dehradun | (0135) - 2761173 /2763949 | 99-174-60140 | ddncall@hcl.in |
| Delhi(City) RO | (120) - 3201511, (120) - 3201513 (120) - 2549877 | calldel@hcl.in | |
| Delhi (NIC) RO | (0120) - 24360848 | 96-508-00339 | hclnic@hcl.in |
| Guwahati | (0361) - 2667974 / 2668165 | sso.gti.callboard@hcl.in | |
| Hyderabad | (040) - 27765197 (8 lines) with Hunting | callhyd@hcl.in | |
| Jaipur | (0141)-270-9813 / 270-9723 | 99-291-11051 / 52 / 53 | cbrdjpr@hcl.in |
| Cochin | (0484)-234-0612 /234-0619, 652-1834, 401-6503, 401-6105,401-6103, 401-6104, 401-6106 | 9895242825/ 94-475-25796 | callchn@hcl.in |
| Kolkata | (033) - 4401-2000 / 4401-2001 / 4401-2002 / 4401-2003 / 4401-2034s | callkol@hcl.in | |
| Lucknow | (0522)-4087-400 (4 lines with Hunting) / 408-7407 / 408-7408/ 408-7410/ 408-7411 | 94-150-19319 | lknclbd@hcl.in |
| Mumbai-Andheri/Thane/Worli/Ballard Estate | (022)-6782-8000 with 9 hunting lines | cbmgr@hcl.in | |
| Nagpur | (0712) - 2233407, 2232408 | 99-229-60021 | ngcaldsk@hcl.in |
| Noida | (0120) - 2549876/2522640/2531350 | noicall@hcl.in | |
| Patna | (0612) - 2270050 / 51 | North Bihar:-- 93-344-85402 South & West Bihar:-- 93-344-85401 East Bihar:-- 93-344-85403 | ptncallb@hcl.in |
| Pune | (020)-4011-4330 5 hunting line (020)-2663-4562, 2663-4563 | 96-650-59968 | cbopun@hcl.in |
| Raipur | ( 0771)-403-7163 / 408-9964 | calbdrpr@hcl.in | |
| Ranchi | (0651) - 2242216/217/218 | Ranchi:-- 99-559-99823 North Jharkhand:-- 93-346-62609 South East Jharkhand:-- 92-341-34078 North East Jharkhand:-- 93-346-62670 | calbdrnc@hcl.in |
| Trichy | (0431)-246-3011 | 98-942-30066, 98-942-40066, 98-942-50066 | cbtcy@hcl.in |
