Business Customer Gateway
https://gateway.usps.com/eAdmin/view/signin
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PostalPro
http://postalpro.usps.gov
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Zip Code Lookup
https://tools.usps.com/go/ZipLookupAction
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Postal Explorer
http://pe.usps.gov/
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Mail Service Updates
http://about.usps.com/news/service-alerts/welcome.htm |
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Postal Bulletin
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EDDM
https://eddm.usps.com/eddm/
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USPS Frequently Asked Questions
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National Customer Support Center (NCSC)
1-800-238-3150
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