Area Codes of Utah
PSC opts for an 'overlay' rather than geographic split
Say hello to a new area code — and to dialing 10 digits for a local phone call.
Citing several reasons, the Utah Public Service Commission opted Thursday to bring on the new
385 telephone area code through an "overlay" rather than through a geographic split of the existing
801 area. The new code takes effect next year.
Area Code Map
With an overlay, the 385 area code will be assigned to new phone numbers throughout the five-
county Wasatch Front region after the 801 code is depleted. One result is that existing customers
will keep their phone numbers. Another will be that callers will need to dial 10 digits for local calls.
In announcing the area code plans Thursday, the commission said an overlay is "much less
disruptive" for customers and "treats all business and residential customers in Weber, Morgan,
Davis and Utah counties the same by allowing them to retain their telephone numbers."
Had the commission opted for the geographic split, only Salt Lake County customers would have
retained the 801 area code and their current phone numbers, while those in the four other counties
would have switched to 385.
"All customers in the four counties would incur the costs and inconvenience of changing their
numbers to the new 385 area code if a split were adopted," the commission said.
"All customers in the four counties would incur the costs and inconvenience of changing their
numbers to the new 385 area code if a split were adopted," the commission said.
The overlay also will avoid confusion, because all long-distance calls will require 11-digit dialing
and a split still would have required Salt Lake and Davis county customers to dial 10 digits to call
one another. "The use of 10-digit dialing cannot be entirely avoided regardless of whether an area
code split or overlay is selected," the commission said in its Thursday order.
The commission noted that several other states have found overlays "easy to implement, and
customers have been very satisfied."
"This experience has shown that difficulties with widespread customer confusion with an area code
overlay did not materialize as feared," the commission order stated.
The commission also said that technological innovations and telephone device reprogramming have
made customers less dependent on dialing numbers to place calls, and the overlay method was
supported by the telecommunications industry and the state Division of Public Utilities. The Utah
Committee of Consumer Services also advocated the overlay.
The commission sought public written comments on the overlay and split options, and it said
Thursday it received "a number" of them, with some favoring an overlay and some favoring a split.
Telecom companies and the division will be required to file periodic reports to the commission on
their plans to implement the overlay.
The overlay transition is expected to occur first through a "permissive" period, during which
customers would be able to dial either seven or 10 digits for local calls. A "mandatory" period
would follow, and callers trying to use only seven digits for a local call would get a recording
reminding them to dial the area code first.
The new area code implementation was first ordered in 2000, but number-conservation measures
postponed its activation. At a technical conference in April, the commission said that new phone
numbers are expected to exhaust the 801 area code by June 2008.
Telecom companies preferred the overlay method in 2000, but the commission found it
"unacceptable," citing several reasons but saying it was "primarily concerned with minimizing the
impact on the general populace." People attending four public hearings that year voiced support for
the split.
But telecom representatives in April said customer habits and preferences had changed since 2000
and that a split would be confusing and costly to customers having to switch to the 385 code. In
particular, small businesses with a new area code could be hurt as customers try to call them with
the old area code, they said.
The telecom reps also noted at the time that burglar and fire alarm companies would need early
notification if an overlay were used because some still program systems using seven-digit numbers.
Telephone directory companies are expected to begin listing numbers in a 10-digit format.

 
Current Area Code *801
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Current Area Code *435

Richfield


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