You can determine where a team originates from by the first three numbers of their 9 digit team ID number.
For example: Team ID # 104123456 is from the Seattle Youth Soccer Association.
District 1
104 Seattle YSA
106 South Snohomish County YSA
113 North County YSA
125 Whidbey Island YSA
128 Whatcom County YSA
133 Skagit Valley YSA
143 Snohomish YSA
District 2
201 Eastside YSA
207 Lake Washington YSA
210 Northshore YSA
215 Snoqualmie Valley YSA
District 3
302 Federal Way SA
303 Tacoma Pierce County JSA
305 Highline SA
308 Greater Renton JSA
309 Auburn YSA
311 Mount Rainier SA
317 Kent YSA
338 Narrows YSA
339 Maple Valley SA
District 4
418 Kitsap Peninsula YSA
420 Olympic YSA
440 NorthWest Sound YSA
District 5
514 Columbia YSF
531 Cowlitz YSA
536 East County YSA
District 6
616 Wenatchee Valley YSA
619 Kittitas Valley JSA
621 Tri-City YSA
622 Spokane Valley JSA
624 Yakima YSA
626 North Central YSA
627 Walla Walla YSA
629 Columbia Basin YSA
630 Lower Yakima Valley YSA
634 Spokane YSAS
642 Pullman YSA
District 7
712 Thurston County YSA
732 Grays Harbor YSA
735 Lewis County YSA
737 Foothills YSA
741 Deschutes YSA