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Forgot Your Customer Number?
- Your customer number appears every issue above your name and address on your
print subscription mailing label. The mailing label is printed directly on the
plastic mailing bag.
Request your customer number via e-mail at jcoservice{at}asco.org
or call JCO Customer Service:
- Domestic (888) 273-3508
- International (703) 519-1430
- Hours: 8:30 a.m.-5:30 p.m. ET Monday-Friday
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