Guide. A cortisol test is done to measure the level of the hormone cortisol in the blood. The cortisol level may show problems with the adrenal glands or pituitary gland.
Berkeley lies within telephone area code 510 (until September 2, 1991, Berkeley was part of the 415 telephone code that now covers only San Francisco and Marin counties), and the postal ZIP codes are 94701 through 94710, 94712, and 94720 for the University of California campus.
Some telephone area codes are overlaid, requiring 10-digit dialing. AreaCode.org is your one-stop site for area code lookup, area code search, and area code locator. Area code 415 serves the county and city of San Francisco, portions of Brisbane and Daly City, and Marin County in California.15 Area Code. AreaCode.org is an area code finder with detailed information on the 415 area code including 415 area code map. Major cities like San Francisco within area code 415 are also listed on this page. More area codes, including those outside of California, are found on the AreaCode.org homepage.