| Business | Phone |
| City Of Newark Senior Center 7401 Enterprise Dr, Newark 94560 | (510) 742-4840 |
| City Personnel 37101 Newark Blvd, Newark 94560 | (510) 790-7267 |
| Newark Building Inspection 37101 Newark Blvd, Newark 94560 | (510) 790-7261 |
| Newark Engineering 37101 Newark Blvd, Newark 94560 | (510) 790-7290 |
| Newark Planning 37101 Newark Blvd, Newark 94560 | (510) 794-2330 |
| Newark Silliman Center 6800 Mowry Ave, Newark 94560 | (510) 742-4700 |
| Newark Streets 37440 Filbert St, Newark 94560 | (510) 794-2370 |
| Newark Streets & Trees Dept 37440 Filbert St, Newark 94560 | (510) 742-4801 |
| George M Silliman Family Aqtc 6800 Mowry Ave, Newark 94560 | (510) 742-4400 |