Where out-of-town numbers come from

Each row pairs the state an area code was issued for with the state where numbers carrying it are listed. These are the 150 busiest of 1,575 such routes, across 30,273 numbers.

Area code's state	to	Listed in	Numbers	Most in
California	→	Virginia	902	Tysons Corner, VA
California	→	New York	694	New York City - Manhattan, NY
California	→	Washington DC	584	Washington, D.C., DC
California	→	Illinois	477	Chicago, IL
Florida	→	New York	474	New York City - Manhattan, NY
New York	→	Virginia	429	Tysons Corner, VA
California	→	Maryland	389	Baltimore, MD
Florida	→	Virginia	387	Tysons Corner, VA
Florida	→	North Carolina	362	Charlotte, NC
Florida	→	Washington DC	343	Washington, D.C., DC
New York	→	California	318	Los Angeles, CA
New York	→	Florida	295	Orlando, FL
California	→	Florida	288	Orlando, FL
California	→	Georgia	286	Atlanta, GA
California	→	North Carolina	282	Raleigh, NC
Florida	→	California	265	Los Angeles, CA
Florida	→	Illinois	257	Chicago, IL
Texas	→	California	251	San Diego, CA
California	→	Massachusetts	242	Boston, MA
Florida	→	Massachusetts	241	Boston, MA
New York	→	Washington DC	232	Washington, D.C., DC
Florida	→	New Jersey	231	Secaucus, NJ
California	→	New Jersey	230	Secaucus, NJ
New York	→	Maryland	226	Baltimore, MD
California	→	Texas	224	Houston, TX
Florida	→	Ohio	219	Cleveland, OH
California	→	Pennsylvania	215	Philadelphia, PA
New York	→	Illinois	208	Chicago, IL
New York	→	North Carolina	205	Raleigh, NC
Florida	→	Pennsylvania	200	Philadelphia, PA
California	→	Utah	196	Salt Lake City, UT
Texas	→	Illinois	191	Chicago, IL
California	→	Minnesota	189	Minneapolis, MN
California	→	Ohio	188	Cleveland, OH
Nevada	→	Virginia	186	Tysons Corner, VA
Nevada	→	Illinois	180	Chicago, IL
Florida	→	Maryland	169	Baltimore, MD
Texas	→	Virginia	160	Tysons Corner, VA
New York	→	Georgia	159	Atlanta, GA
Nevada	→	New York	157	New York City - Manhattan, NY
Texas	→	Florida	142	Orlando, FL
Maryland	→	New Jersey	135	Mount Laurel, NJ
Texas	→	New York	131	New York City - Manhattan, NY
Florida	→	Minnesota	130	Minneapolis, MN
Washington	→	California	124	San Diego, CA
California	→	Colorado	123	Denver, CO
Georgia	→	Virginia	116	Springfield, VA
New York	→	Ohio	116	Cleveland, OH
New Jersey	→	Virginia	115	Tysons Corner, VA
Florida	→	Arizona	113	Phoenix, AZ
California	→	Hawaii	112	Honolulu - Waikiki, HI
Nevada	→	Washington DC	112	Washington, D.C., DC
Texas	→	Georgia	111	Atlanta, GA
California	→	Washington	106	Seattle, WA
Georgia	→	Washington DC	103	Washington, D.C., DC
Illinois	→	Minnesota	103	Minneapolis, MN
Michigan	→	Illinois	102	Chicago, IL
Georgia	→	New York	101	New York City - Manhattan, NY
Texas	→	Washington DC	101	Washington, D.C., DC
Illinois	→	California	95	Los Angeles, CA
Texas	→	Arizona	93	Phoenix, AZ
Texas	→	North Carolina	93	Raleigh, NC
Virginia	→	California	93	Newport Beach, CA
Nevada	→	Georgia	86	Atlanta, GA
Florida	→	Texas	85	Houston, TX
Georgia	→	California	82	Los Angeles, CA
Washington	→	Arizona	82	Phoenix, AZ
Florida	→	South Carolina	81	Charleston, SC
Nevada	→	Florida	81	Orlando, FL
Ohio	→	Florida	81	Tampa, FL
Minnesota	→	Illinois	80	Chicago, IL
New Jersey	→	Florida	80	Orlando, FL
Illinois	→	New York	79	New York City - Manhattan, NY
North Carolina	→	Florida	79	Orlando, FL
Nevada	→	Maryland	79	Baltimore, MD
Nevada	→	Minnesota	78	Minneapolis, MN
Texas	→	Maryland	76	Baltimore, MD
California	→	Missouri	73	St. Louis, MO
New York	→	Minnesota	73	Minneapolis, MN
Illinois	→	Virginia	72	Arlington, VA
Nevada	→	New Jersey	71	Secaucus, NJ
Ohio	→	Illinois	70	Chicago, IL
Georgia	→	Illinois	69	Chicago, IL
Washington DC	→	New Jersey	68	Mount Laurel, NJ
Illinois	→	Florida	68	Orlando, FL
New York	→	Texas	67	Houston, TX
California	→	New Mexico	66	Albuquerque, NM
Massachusetts	→	Florida	66	Orlando, FL
Pennsylvania	→	Virginia	66	Richmond, VA
Texas	→	Nevada	66	Las Vegas, NV
New Jersey	→	Massachusetts	65	Boston, MA
Florida	→	Michigan	64	Detroit, MI
Nevada	→	Massachusetts	64	Boston, MA
New York	→	Arizona	64	Phoenix, AZ
Florida	→	Nevada	63	Las Vegas, NV
New Jersey	→	California	63	San Diego, CA
Texas	→	Minnesota	63	Minneapolis, MN
Colorado	→	California	62	Los Angeles, CA
Illinois	→	Georgia	62	Atlanta, GA
New Jersey	→	Maryland	62	Baltimore, MD
Texas	→	Pennsylvania	62	Philadelphia, PA
Arizona	→	Illinois	61	Chicago, IL
California	→	Wisconsin	61	Milwaukee, WI
Florida	→	Wisconsin	60	Milwaukee, WI
Nevada	→	North Carolina	60	Raleigh, NC
Pennsylvania	→	Washington DC	60	Washington, D.C., DC
California	→	Michigan	58	Detroit, MI
Georgia	→	Maryland	58	Baltimore, MD
Nevada	→	Pennsylvania	58	Philadelphia, PA
Ohio	→	Georgia	58	Atlanta, GA
California	→	Connecticut	57	Hartford, CT
Florida	→	Connecticut	56	Hartford, CT
Pennsylvania	→	Florida	56	Orlando, FL
Texas	→	Ohio	56	Columbus, OH
Virginia	→	New York	56	New York City - Manhattan, NY
Texas	→	Massachusetts	55	Boston, MA
Texas	→	Missouri	55	St. Louis, MO
Hawaii	→	California	54	San Diego, CA
North Carolina	→	New York	54	New York City - Manhattan, NY
New Jersey	→	Washington DC	54	Washington, D.C., DC
Oregon	→	Arizona	54	Phoenix, AZ
Texas	→	Colorado	53	Denver, CO
Illinois	→	Ohio	52	Cleveland, OH
Nevada	→	Texas	52	Houston, TX
Florida	→	Tennessee	51	Nashville, TN
Michigan	→	Florida	51	Tampa, FL
California	→	South Carolina	50	Charleston, SC
New Jersey	→	Georgia	50	Atlanta, GA
Pennsylvania	→	North Carolina	50	Charlotte, NC
Washington	→	Virginia	50	Tysons Corner, VA
Washington DC	→	New York	49	New York City - Manhattan, NY
Massachusetts	→	Virginia	49	Tysons Corner, VA
Washington	→	Nevada	49	Las Vegas, NV
Massachusetts	→	Maryland	48	Baltimore, MD
Missouri	→	California	48	San Diego, CA
North Carolina	→	Maryland	48	Baltimore, MD
New Jersey	→	North Carolina	48	Raleigh, NC
Ohio	→	Virginia	48	Alexandria, VA
Texas	→	New Jersey	47	Trenton, NJ
Colorado	→	Arizona	46	Phoenix, AZ
Georgia	→	Ohio	46	Columbus, OH
Ohio	→	California	46	Anaheim, CA
Illinois	→	Washington DC	45	Washington, D.C., DC
Nevada	→	Ohio	45	Cleveland, OH
New York	→	Nevada	45	Las Vegas, NV
Virginia	→	Illinois	45	Chicago, IL
Washington	→	Washington DC	45	Washington, D.C., DC
Arizona	→	Virginia	44	Tysons Corner, VA
Louisiana	→	California	44	San Diego, CA
Louisiana	→	Georgia	44	Atlanta, GA

Neighbouring states are left out on purpose: a number from next door is ordinary. Many providers tour, or keep the number they had before they moved.