| Head Office Branch | | Address | : No 269, Galle Road, Colombo 03 | | Tel | : 0117722702,5745555 | | Fax | : 2573346 | | e-mail | : butb@smib.lk |
| | | Battaramulla Branch | | Address | : No 108, Main Street, Battaramulla | | Tel | : 011-7723570, 011-2882144 | | Fax | : 2882144 | | | |
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| Gamapaha Branch | | Address | : No 232, Colombo Road, Gampaha | | Tel | : 033-7722722, 033-2221316 | | Fax | : 033-2221317 | | e-mail | : gmpb@smib.lk |
| | | Kiribathgoda Branch | | Address | : No 63, Kandy Road, Kiribathgoda | | Tel | : 011-7723575, 011-2908833 | | Fax | : 2908833 | | | |
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| Kandy Branch | | Address | : No 61,1 Floor, Kings Street, kandy | | Tel | : 081-7722722, 081-2222819 | | Fax | : 081-4471826 | | e-mail | : kyndb@smib.lk |
| | | Kegalle Branch | | Address | : No 82, Main Street, Kegalle | | Tel | : 035-7722722, 035-2222877 | | Fax | : 035-2222877 | | | |
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| Kurunegala Branch | | Address | : No 21, 1 Floor, Athula Cooray Building, Dambulla Road, Kurunegala | | Tel | : 037-7722722,037-2231234 | | Fax | : 037-2231234 | | e-mail | : krgb@smib.lk |
| | | Chilaw Branch | | Address | : No 15A, Bishop Edmond Peiris Mawatha, Chilaw | | Tel | : 032-7722722, 032-2223996 | | Fax | : 032-2223980 | | e-mail | : chwb@smib.lk |
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| Galle Branch | | Address | : No 50, 1 st Floor, Havelock Road, Galle Road, Galle | | Tel | : 091-7722722, 091-2246788 | | Fax | : 091-2246788 | | e-mail | : glb@smib.lk |
| | | Matara Branch | | Address | : No 45A 1/1,1 st Floor,Dharmapala Mawatha,Matara | | Tel | : 041-7722722, 060-24056459,041-2222204 | | Fax | : 041-2222209 | | e-mail | : mtrb@smib.lk |
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| Mathugama Branch | | Address | : Kalutara Road, Matugama | | Tel | : 034-7722722, 034-2243713 | | Fax | : 034-2243714 | | e-mail | : mtgb@smib.lk |
| | | Horana Branch | | Address | : No 45, Ratnapura Road, Horana | | Tel | : 034-7722733 , 57409312 | | Fax | : 57409312 | | | |
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| Ambalantota Branch | | Address | : No 122, Main Street, Ambalantota | | Tel | : 047-7722722, 047-5677818 | | Fax | : 047-5677818 | | | |
| | | Batticaloa Branch | | Address | : No 44, Station Road, Batticaloa | | Tel | : 065-7722722 , 065-2222229 | | Fax | : 065-2222229 | | | |
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| Jaffna Branch | | Address | : No 127, Stanley Road, Jaffna | | Tel | : 021-7722722 , 021-2220263 | | Fax | : 021-2220263 | | | |
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