Geographic Zone Codes

REEF uses a hierarchical 8-digit code system for survey site locations. Each geographic area has its own set of codes. When completing a survey, you need to know the complete 8-digit code for the site you surveyed.

If the site that you surveyed is not currently on our list, then please email zonecode@REEF.org to request a new code to be assigned. Please provide the site name, general location, and ideally the latitude and longitude.

Tropical Western Atlantic Zone Code List -- TWA
(Florida, Bahamas, Caribbean, Gulf of Mexico)

Southern Atlantic States -- SAS
(North and South Carolina, Georgia)

Northeast Zone Code List -- NE
(Virginia - Eastern Canada)

Pacific Coast Zone Code List -- PAC
(California, Oregon, Washington, British Columbia, Alaska)

Tropical Eastern Pacific Zone Code List -- TEP
(Gulf of California to the Galapagos Islands)

Hawaiian Islands -- HAW
(incl. NWHI and Johnston Atol)

South Pacific -- SOP

Design by Joanne Kidd, development by Ben Weintraub