Phone prefix +1 (603) 812-XXXX
Phone prefix: +1603812
This prefix is distributed within the state New Hampshire
The largest city within this prefix is Portsmouth, NH
District: Rockingham
The largest organization: Rnk
Time Zone: Eastern
Winter time: UTC-5
Summer time: UTC-4
The largest city within the prefix of +1 (603) 812-XXXX numbers is shown below
Portsmouth, NH.