• 110 General Information
• 120 Preparation for Mailing
• 130 Mailability
• 140 International Mail Categories
• 150 Postage

• 210 Global Express Guaranteed
• 220 Express Mail International
• 230 Priority Mail International
• 240 First-Class Mail International
• 250 (Reserved)
• 260 Direct Sacks of Printed Matter to One Addressee (M–bags)
• 270 Free Matter for the Blind or Other Physically Handicapped Persons
• 280 (Reserved)
• 290 Commercial Services

• 310 Certificate of Mailing
• 320 Insurance
• 330 Registered Mail
• 340 Return Receipt
• 350 Restricted Delivery
• 360 (Reserved)
• 370 International Money Transfer Services
• 380 Supplemental Services

• 410 Postmarking
• 420 Shortpaid and Unpaid Mail
• 430 Improperly Prepared Mail
• 440 Extra Services Mail — Registered Mail

• 510 (Reserved)
• 520 Foreign Trade Regulations — U.S. Census Bureau
• 530 Commodities and Technical Data
• 540 Munitions (Defense Articles) and Related Technical Data
• 550 Dried Whole Eggs
• 560 (Reserved)
• 570 Consular and Commercial Invoices
• 580 Drawback Arrangement
• 590 Exporting Wildlife and Protected Plants

• 610 Postal Qualified Wholesaler Program

• 710 U.S. Customs Information
• 720 Plant and Animal Quarantine Inspection
• 730 Shortpaid Mail to the United States
• 740 Irregular Mail
• 750 Extra Services
• 760 Forwarding
• 770 Undeliverable Mail
• 780 Items Mailed Abroad by or on Behalf of Senders in the United States

8 (Reserved)

9 Inquiries, Indemnities, and Refunds

• 910 Reports Encouraged
• 920 Inquiries and Claims
• 930 Indemnity Payments
• 940 Postage Refunds

• Afghanistan - Belgium
• Belize - Cape Verde
• Cayman Islands - Ecuador
• Egypt - Ghana
• Gibraltar - Ireland
• Israel - Lithuania
• Luxembourg - Mozambique
• Namibia - Portugal
• Qatar - Slovak Republic
• Slovenia - Thailand
• Togo - Zimbabwe