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.
AreaCode.org is an area code finder with detailed information on the 424 area code including 424 area code map. Major cities like Beverly Hills within area code 424 are also listed on this page. More area codes, including those outside of California, are found on the AreaCode.org homepage.24 Area Code 424. At AreaCode.org, you'll find helpful information on the 424 area code, including 424 area code location. Other phone area codes may be found using AreaCode.org's area code locator.