• 12 – Route 2 east of Route 110/111
• 14 – Route 2 west of Route 110/111
• 21 – Out of town assist
• 31 – Old Library
• 32 – Harvard Common
• 33 – Unitarian Church
• 34 – Town Hall
• 35 – Fire Station
• 36 – Congregational Church
• 41 – Public Safety Building
• 45 – Still River Fire Station
• 52 – Town Beach
• 53 – Lancaster Shore, Turners Lane
• 54 – Willard Lane, Clinton Shore Drive
• 112 – St. Theresa Catholic Church
• 113 – Willow Road
• 114 – Madigan Lane
• 115 – Still River Road from town center to Prospect Hill Road
• 116 – Still River Depot Road
• 117 – Still River Road at Bolton town line, St. Benedict's School
• 118 – Under Pin Hill Road, Lovers Lane
• 121 – Depot Road at Craggs Road, Pattee Road, Transfer Station
• 122 – Harvard Depot Road
• 123 – Prospect Hill Road, Fruitlands
• 124 – Whitney Road
• 125 – Mill Road
• 126 – Old Shirley Road
• 131 – Ayer Road from town center to Route 2
• 132 – Ayer Road from Route 2 to Old Mill Road
• 133 – Ayer Road from Old Mill Road to Ayer town line, Appleworks Building
• 134 – Lancaster County Road, Cedar Ledge Road
• 135 – Old Mill Road
• 136 – Blanchard Road
• 141 – Poor Farm Road
• 142 – South Shaker Road, Quarry Lane
• 143 – Glenview Drive
• 144 – South Shaker Road at Ayer town line, Sheehan Road
• 145 – Shaker Hills
• 211 – Littleton Road from Fairbank Street to Cruft Lane, Orchard Hill
• 212 – Littleton Road from Cruft Lane to Route 2 bridge
• 213 – Littleton Road from Route 2 bridge to Littleton town line
• 214 – Sawyer Lane
• 215 – Old Littleton Road from Fairbank Street to Old Schoolhouse Road
• 216 – Old Littleton Road from Old Scholhouse Road to Littleton town line
• 217 – Green Hill Road

• 221 – Pinnacle Road
• 222 – Park Lane
• 223 – Little Common (Fairbanks Street)
• 224 – Oak Hill Road
• 225 – Cleaves Hill Road
• 226 – Woodchuck Hill Road
• 227 – Route 111 at Stow Road
• 231 – Route 111 at Boxborough town line
• 232 – Sherry Lane
• 233 – Littleton County Road at Cleaves Hill Road
• 234 – Littleton County Road at Littleton town line
• 235 – Slough Road
• 236 – Stow Road from Mass Avenue to Codman Hill Road
• 241 – Stow Road from Codman Hill Road to town line
• 242 – Murray Lane
• 243 – Eldridge Road
• 311 – Finn Road at Stow town line
• 312 – Hillcrest Drive
• 313 – Withington Lane
• 314 – East Bare Hill Road
• 315 – Westcott Road
• 316 – Jacob Gates Road
• 321 – Bromfield Street at Bolton Road
• 322 – Bolton Road at West Bare Hill Road
• 323 – Bolton Road at Bolton town line
• 324 – Partridge Hill Road, Deerfoot Trail
• 325 – Brown Road
• 411 – West Bare Hill Road
• 412 – Woodside Road
• 413 – Scott Road, Candleberry Lane
• 414 – Bowers Road
• 511 – Warren Avenue
• 512 – Tahanto Trail
• 513 – Peninsula Road
• 4321 – Elementary School
• 5321 – New Library
• 3321 – Bromfield House
• 6321 – The Bromfield School

Special Signals

• 10 – repeated – Civil Defense call
• 2-2-2 – all clear
• 5-5-5 – no school, blown at 7:00 a.m.
• 2 – test blows at 12:00 noon