| Trunklines: (072) 607 - 4261 | |
| Department / Office Division / Section | Local Number |
| Municipal Mayor's Office | 200 |
| Municipal Treasurer's Office | 203 |
| Municipal Assessor's Office | 205 |
| Municipal Registrar's Office | 206 |
| Municipal Accounting Office | 208 |
| Municipal Planning and Dev't Coordinator Office | 209 |
| Human Resource Management Office |
211 |
| Security |
212 |
| Municipal Engineering Office | 213 |
| Municipal Social Welfare and Dev't Office | 214 |
| Department of Interior and Local Government (Bacnotan) | 216 |
| Municipal Agriculture Office | 217 |
| Sangguniang Bayan | 218 |
| Municipal Budget Office | 219 |
| Bids and Awards Committee | 220 |
| Bureau of Fire and Protection | 221 |
| Philippine National Police (Bacnotan) | 222 |
| Municipal Health Office | 223 |
| Negosyo Center | 225 |
| Business Permit and Licensing | 227 |
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