Average GPS coordinates for Billerica Postcode location: 42.499, -71.356. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Billerica on map:

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Listing cities & postcodes (2):
>> Massachusetts, 01821 Billerica, Middlesex, GPS coordinates: 42.5519,-71.2518
>> Massachusetts, 01822 Billerica, Middlesex, GPS coordinates: 42.4464,-71.4594