Area code 628

Largest exchanges

• Snfc Cntrl76
• Snfc Mt-Ev26
• San Rafael17
• Snfc Junpr14
• Belvedere10
• Novato7
• Cortemadra7
• Millvalley7
• Sausalito7
• Ignacio6

Largest carriers

• Fractel, LLC33
• Onvoy, LLC - CA32
• T-mobile Usa, Inc.28
• Teleport Communications America, LLC - CA17
• Bandwidth.com Clec, LLC - CA13
• New Cingular Wireless Pcs, LLC12
• Cellco Partnership dba Verizon Wireless - CA9
• Peerless Network Of California, LLC - CA8
• Level 3 Communications, LLC - CA6
• Pacific Bell3

Most reported 628 numbers

No visitor reports yet in this area code.

FCC complaints

• 628-468-11731 · 2026-10-07
• 628-287-42421 · 2026-10-05
• 628-229-06161 · 2026-10-03