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Operation Code Definitions Matrix

Process Name Operation Codes (*) Flats Processing Definition
Delivery Point Sequence (DPS) 1st Pass 2nd Pass Mail that is sorted into carriers’ walk
912, 914, 918 905, 911, 913, sequence.
915, 919 1st Pass Requires additional processing on automated equipment in most cases; last processing for some mailpieces (e.g., firm holdouts, box sections, and Postal Service facilities). 2nd Pass Final processing of mail.
Managed Mail 143*, 263, 273, 283, 333*, 403*, Mail normally sorted from an AADC
413*, 423*, 433*, 443*, 463*, level down to 3-digit ZIP Code level,
483, 493, 503, 803*, 813*, 833, with high-volume 5-digit zones and
843, 853, 863, 873, 883, 893, firms also held out; additional
963, 973 processing required on automated equipment for the 3-digit sorted volume and the 5-digit sorted volume for which the plant has incoming secondary, DPS, sector/segment, or box section sorting responsibility.
Incoming (I/C) SCF 144*, 264, 274, 284, 334*, 364, Mail normally separated by the host
374, 394, 404*, 414*, 424*, 444*, SCF by 5-digit ZIP Code; additional
464*, 484, 494, 504, 804*, 814*, processing on automated equipment is
824, 834, 844, 854, 864, 874, required for the 5-digit ZIP Codes for
884, 894, 964, 974 which the plant has incoming secondary, DPS, sector/segment, or box section sorting responsibility; AZI table provides more detailed information about processing for each ZIP Code.
Incoming (I/C) Primary 145*, 253, 265, 275, 285, 335*, Mail normally separated by the host
365, 375, 395, 405*, 415*, 425*, SCF by 5-digit ZIP Code for which it
445*, 465*, 485, 495, 505, 805*, has delivery responsibility; additional
815*, 825, 835, 845, 855, 865, processing on automated equipment is
875, 885, 895, 965, 975 normally required for which the plant has incoming secondary, DPS, sector/ segment, or box section sorting responsibility; AZI table provides more detailed information about processing for each ZIP Code.
Incoming (I/C) Secondary 146*, 266, 276, 286, 336*, 366, Mail normally separated by carrier
376, 396, 406*, 416*, 426*, 446*, route. It may be finalized or additional
466*, 486, 496, 506, 806*, 816*, processing may be required for letter
826, 836, 846, 856, 866, 876, mail on automated equipment (e.g.,
886, 896, 906, 909, 966, 976 CSBCS); final processing for flats.
Box Section 147, 267, 277, 287, 337*, 367, Mail normally separated by P.O. box
377, 397, 407*, 417*, 427*, 447*, section. In most instances, this is the
467*, 487, 497, 507, 807*, 817, final automated processing for this mail
827, 837, 847, 857, 867, 877, (manual sorting required to separate
887, 897, 910, 967, 977 mail by individual P.O. box). In some instances, mail is separated into individual P.O. boxes by repeating this operation on automated equipment (this is the reason why mailers may receive multiple scans with the same Operation Code for a given piece).
Sector/Segment (SEC/SEG, S/S) 1st Pass 2nd Pass 1st Pass
828, 878, 898, 829, 879, 899 Mail normally separated by ZIP+4
908 sectors; requires additional processing on automated equipment. 2nd Pass Mail normally separated by ZIP+4 segments; final processing of mail.
Outgoing (O/G) Primary 141*, 252, 261, 271, 281, 331*, Mail separated by AADC and 3-digit
361, 371, 391, 401*, 411*, 421*, ZIP Code separations (for 2-day and
441*, 461*, 481, 491, 501, 801*, 3-day Delivery Standard); requires
811*, 821, 831, 841, 851, 861, additional processing on automated
871, 881, 891, 961, 971 equipment.
Outgoing (O/G) Secondary 142*, 262, 272, 282, 332*, 362, Mail separated by AADC and 3-digit
372, 392, 402*, 412*, 422*, 442*, ZIP Code separations (for 3-day
462*, 482, 492, 502, 802*, 812*, Delivery Standard); requires additional
822, 832, 842, 852, 862, 872, processing on automated equipment.
882, 892, 962, 972


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