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.
Marin County, and San Francisco County. Major cities or places in California within area code 415 include: Area code 415 serves the larger communities of Novato, San Anselmo, San Francisco, and San Rafael, most of Marin County and all of San Francisco County.rea code 415 was put into service. In 1959 area code 415 was split to form area codes 408 and 707. In 1991 area code 415 was split to form area code 510.