USPS Operation Codes

“Mail Processing” Codes — Operations at Plants

046 ISS - RETURN TO SENDER LTR
047 OSS - RETURN TO SENDER LTR
080C COMPOSITE - 081 & 082
081 COA FORMS KEYING LTR
082 PARS IMAGE KEYING LTR
090C CIOSS 09-099 LTR
091 CIOSS RTS IMAGE LIFT MODE LTR
092 CIOSS INTERCEPT LABEL MODE LTR
093 CARRIER FORWARDS IMAGE LIFT LTR
094 CIOSS REVERSE SIDE SCAN LTR
095 CIOSS RESCAN LTR
096 CIOSS OTHER LTR
097 CIOSS INTERCEPT IMAGE LIFT MODE LTR
098 CIOSS FORWARDS LABEL MODE LTR
099 CIOSS RTS LABEL MODE LTR
140 FLAT MAIL PREPARATION ATHS/AI MACHINE
141C COMPOSITE AFSM 100 - ATHS/AI
141 AFSM 100 - ATHS / AI - OUTGOING PRIMARY FLT
142 AFSM 100 - ATHS / AI - OUTGOING SECONDARY FLT
143 AFSM 100 - ATHS / AI - MANAGED MAIL FLT
144 AFSM 100 - ATHS / AI - INCOMING SCF FLT
145 AFSM 100 - ATHS / AI - INCOMING PRIMARY FLT
146 AFSM 100 - ATHS / AI - INCOMING SECONDARY FLT
147 AFSM 100 - ATHS / AI - BOX SECTION FLT
194 AFSM100-INTERNATIONAL EXPORT FLT
195 AFSM100-INTERNATIONAL IMPORT FLT
260C COMPOSITE DBCS/DIOSS-OCR MODE (261-267)
261 DBCS/DIOSS OCR MODE - OUTGOING PRIMARY LTR
262 DBCS/DIOSS OCR MODE - OUTGOING SECONDARY LTR
263 DBCS/DIOSS OCR MODE - MANAGED MAIL LTR
264 DBCS/DIOSS OCR MODE - INCOMING SCF PRIMARY LTR
265 DBCS/DIOSS OCR MODE - INCOMING PRIMARY LTR
266 DBCS/DIOSS OCR MODE - INCOMING SECONDARY LTR
267 DBCS/DIOSS OCR MODE - BOX SECTION LTR
270C COMPOSITE DBCS-DIOSS-OSS MODE (270-279,925,926)
271 DBCS-DIOSS OSS MODE - OUTGOING PRIMARY LTR
272 DBCS-DIOSS OSS MODE - OUTGOING SECONDARY LTR
273 DBCS-DIOSS OSS MODE - MANAGED MAIL LTR
274 DBCS-DIOSS OSS MODE - INCOMING SCF PRIMARY LTR
275 DBCS-DIOSS OSS MODE - INCOMING PRIMARY LTR
276 DBCS-DIOSS OSS MODE - INCOMING SECONDARY LTR
277 DBCS-DIOSS OSS MODE - BOX SECTION LTR
280C COMPOSITE DBCS-DIOSS ISS MODE
281 DBCS-DIOSS ISS MODE - OUTGOING PRIMARY LTR
282 DBCS-DIOSS ISS MODE - OUTGOING SECONDARY LTR
283 DBCS-DIOSS ISS MODE - MANAGED MAIL LTR
284 DBCS-DIOSS ISS MODE - INCOMING SCF PRIMARY LTR
285 DBCS-DIOSS ISS MODE - INCOMING PRIMARY LTR
286 DBCS-DIOSS ISS MODE - INCOMING SECONDARY LTR
287 DBCS-DIOSS ISS MODE - BOX SECTION LTR
290C COMPOSITE DIOSS BULKY DBCS MODE LTR
291 DIOSS BULKY DBCS MODE - OUTGOING PRIMARY LTR
292 DIOSS BULKY DBCS MODE - OUTGOING SECONDARY LTR
293 DIOSS BULKY DBCS MODE - MANAGED MAIL LTR
294 DIOSS BULKY DBCS MODE - INCOMING SCF PRIMARY LTR
295 DIOSS BULKY DBCS MODE - INCOMING PRIMARY LTR
296 DIOSS BULKY DBCS MODE - INCOMING SECONDARY LTR
297 DIOSS BULKY DBCS MODE - BOX SECTION LTR
300C COMPOSITE MLOCR - ISS - International
301 MLOCR -ISS - INTERNATIONAL EXPORT LTR
302 MLOCR - INTERNATIONAL EXPORT LTR
303 MLOCR -ISS - INTERNATIONAL IMPORT LTR
304 MLOCR - INTERNATIONAL IMPORT LTR
305 FSM 1000 INTL EXPORT PRIMARY FLT
306 FSM 1000 INTL IMPORT PRIMARY FLT
307 UFSM 1000 INTL EXPORT PRIMARY FLT
308 UFSM 1000 INTL IMPORT PRIMARY FLT
309C COMPOSITE DBCS/DIOSS OCR - INTERNATIONAL
309 DBCS/DIOSS OCR INT-NATIONAL EXPORT PRIM LTR
310C COMPOSITE MPBCS/DBCS/OSS - INTERNATIONAL
311 MPBCS/OSS - INTERNATIONAL - EXPORT LTR
312 MPBCS - INTERNATIONAL - EXPORT LTR
313 DBCS/DIOSS OSS INT EXPORT PRIM LTR
314 DBCS/DIOSS BCS INT EXPORT PRIM LTR
315 MPBCS/OSS - INTERNATIONAL - IMPORT LTR
316 MPBCS - INTERNATIONAL IMPORT] LTR
317 DBCS/DIOSS OSS INT IMPORT PRIM LTR
318 DBCS/DIOSS BCS INT IMPORT PRIM LTR
319 DBCS/DIOSS OCR INT IMPORT PRIM LTR
330C COMPOSITE AFSM100
331 AFSM100 - OUTGOING PRIMARY FLT
332 AFSM100 - OUTGOING SECONDARY FLT
333 AFSM100 - MANAGED MAIL FLT
334 AFSM100 - INCOMING SCF PRIMARY FLT
335 AFSM100 - INCOMING PRIMARY FLT
336 AFSM100 - INCOMING SECONDARY FLT
337 AFSM100 - BOX SECTION FLT
338 AFSM100 - INCOMING NON-SCHEME FLT
339 AFSM100 - RESERVED FLT
356 DBCS/DIOSS ISS INT EXPORT PRIM LTR
357 DBCS/DIOSS ISS INT IMPORT PRIM LTR
385 APPS VCS KEYING - CAREER LTR
386 APPS VCS KEYING - TRANSITIONAL LTR
400C COMPOSITE AFSM 100 - ATHS
401 AFSM 100 - ATHS - OUTGOING PRIMARY FLT
402 AFSM 100 - ATHS - OUTGOING SECONDARY FLT
403 AFSM 100 - ATHS - MANAGED MAIL FLT
404 AFSM 100 - ATHS - INCOMING SCF FLT
405 AFSM 100 - ATHS - INCOMING PRIMARY FLT
406 AFSM 100 - ATHS - INCOMING SECONDARY FLT
407 AFSM 100 - ATHS - BOX SECTION FLT
440C COMPOSITE - UFSM 1000
441 UFSM1000-KEYING - OUTGOING PRIMARY FLT
442 UFSM1000-KEYING - OUTGOING SECONDARY FLT
443 UFSM1000-KEYING - MANAGED MAIL FLT
444 UFSM1000-KEYING - INCOMING SCF FLT
445 UFSM1000-KEYING - INCOMING PRIMARY FLT
446 UFSM1000-KEYING - INCOMING SECONDARY FLT
447 UFSM1000-KEYING - BOX SECTION FLT
448 UFSM1000-KEYING - INCOMING NON-SCHEME FLT
450C COMPOSITE UFSM1000 PRIORITY (450-451)
450 UFSM1000 - PRIORITY, OUTGOING FLT
451 UFSM1000 - PRIORITY, INCOMING FLT
460C COMPOSITE AFSM 100 AI
461 AFSM 100 - AI - OUTGOING PRIMARY FLT
462 AFSM 100 - AI - OUTGOING SECONDARY FLT
463 AFSM 100 - AI - MANAGED MAIL FLT
464 AFSM 100 - AI - INCOMING SCF FLT
465 AFSM 100 - AI - INCOMING PRIMARY FLT
466 AFSM 100 - AI - INCOMING SECONDARY FLT
467 AFSM 100 - AI - BOXED MAIL FLT
468 FSM 1000 BCR - INCOMING NONSCHEME FLT
469 FSM 1000 BCR - RESERVED FLT
481C COMPOSITE DBCS EXPANDED CAPACITY MODE
481 DBCS-EC BULKY MODE - OUTGOING PRIMARY LTR
482 DBCS-EC BULKY MODE - OUTGOING SECONDARY LTR
483 DBCS-EC BULKY MODE - MANAGED MAIL LTR
484 DBCS-EC BULKY MODE - INCOMING SCF PRIMARY LTR
485 DBCS-EC BULKY MODE - INCOMING PRIMARY LTR
486 DBCS-EC BULKY MODE - INCOMING SECONDARY LTR
487 DBCS-EC BULKY MODE - BOX SECTION LTR
490C COMPOSITE DIOSS BULKY ISS MODE
491 DIOSS BULKY ISS MODE - OUTGOING PRIMARY LTR
492 DIOSS BULKY ISS MODE - OUTGOING SECONDARY LTR
493 DIOSS BULKY ISS MODE - MANAGED MAIL LTR
494 DIOSS BULKY ISS MODE -INCOMING SCF PRIMARY LTR
495 DIOSS BULKY ISS MODE - INCOMING PRIMARY LTR
496 DIOSS BULKY ISS MODE - INCOMING SECONDARY LTR
497 DIOSS BULKY ISS MODE - BOX SECTION LTR
500C COMPOSITE DIOSS BULKY OSS MODE
501 DIOSS BULKY OSS MODE - OUTGOING PRIMARY LTR
502 DIOSS BULKY OSS MODE - OUTGOING SECONDARY LTR
503 DIOSS BULKY OSS MODE - MANAGED MAIL LTR
504 DIOSS BULKY OSS MODE - SCF PRIMARY LTR
505 DIOSS BULKY OSS MODE - INCOMING PRIMARY LTR
506 DIOSS BULKY OSS MODE - INCOMING SECONDARY LTR
507 DIOSS BULKY OSS MODE - BOX SECTION LTR
603 MAILER VALIDATION CREDITS FHP, TPH LTR
810C COMPOSITE UFSM 1000 FLT
811 UFSM 1000 OCR - OUTGOING PRIMARY FLT
812 UFSM 1000 OCR - OUTGOING SECONDARY FLT
813 UFSM 1000 OCR - MANAGED MAIL FLT
814 UFSM 1000 OCR - INCOMING SCF PRIMARY FLT
815 UFSM 1000 OCR - INCOMING PRIMARY FLT
816 UFSM 1000 OCR - INCOMING SECONDARY FLT
817 UFSM 1000 OCR - BOX SECTION FLT
818 UFSM 1000 OCR - PRIORITY - OUTGOING FLT
819 UFSM 1000 OCR - PRIORITY - INCOMING FLT
830C COMPOSITE - MLOCR
831 MLOCR - OUTGOING PRIMARY LTR
832 MLOCR - OUTGOING SECONDARY LTR
833 MLOCR - MANAGED MAIL LTR
834 MLOCR - INCOMING SCF LTR
835 MLOCR - INCOMING PRIMARY LTR
836 MLOCR - INCOMING SECONDARY LTR
837 MLOCR -BOX SECTION LTR
840C COMPOSITE - MLOCR Chunky MOD
841 MLOCR BULKY MOD - O/G PRIMARY LTR
842 MLOCR BULKY MOD - O/G SECONDARY LTR
843 MLOCR BULKY MOD - MANAGED MAIL LTR
844 MLOCR BULKY MOD - I/C SCF PRIMARY LTR
845 MLOCR BULKY MOD - I/C PRIMARY LTR
846 MLOCR BULKY MOD - I/C SECONDARY LTR
847 MLOCR BULKY MOD -BOX SECTION LTR
850C COMPOSITE MPBCS Chunky MOD
851 MPBCS CHUNKY MOD - O/G PRIMARY LTR
852 MPBCS CHUNKY MOD - O/G SECONDARY LTR
853 MPBCS CHUNKY MOD - MANAGED MAIL LTR
854 MPBCS CHUNKY MOD - I/C SCF PRIMARY LTR
855 MPBCS CHUNKY MOD - I/C PRIMARY LTR
856 MPBCS CHUNKY MOD - I/C SECONDARY LTR
857 MPBCS CHUNKY MOD - BOX SECTION LTR
860C COMPOSITE BCS ON OCR
861 BCS ON OCR-OUTGOING PRIMARY LTR
862 BCS ON OCR-OUTGOING SECONDARY LTR
863 BCS ON OCR-MANAGED MAIL LTR
864 BCS ON OCR-INCOMING SCF LTR
865 BCS ON OCR-INCOMING PRIMARY LTR
866 BCS ON OCR-INCOMING SECONDARY LTR
867 BCS ON OCR-BOX SECTION LTR
870C COMPOSITE - Mail Processing BCS
870 MPBCS - ALL OPERATION SORT TYPES - INTELLIGENT MAIL BARCODE ONLY LTR
871 MPBCS - OUTGOING PRIMARY LTR
872 MPBCS - OUTGOING SECONDARY LTR
873 MPBCS - MANAGED MAIL LTR
874 MPBCS - INCOMING SCF LTR
875 MPBCS - INCOMING PRIMARY LTR
876 MPBCS - INCOMING SECONDARY LTR
877 MPBCS - BOX SECTION LTR
878 MPBCS - SECTOR/SEGMENT, 1ST PASS LTR
879 MPBCS -SECTOR/SEGMENT, 2ND PASS LTR
880C COMPOSITE MLOCR-ISS
881 MLOCR - ISS-OUTGOING PRIMARY LTR
882 MLOCR - ISS-OUTGOING SECONDARY LTR
883 MLOCR - ISS-MANAGED MAIL LTR
884 MLOCR - ISS-INCOMING SCF LTR
885 MLOCR - ISS - INCOMING PRIMARY LTR
886 MLOCR - ISS - INCOMING SECONDARY LTR
887 MLOCR - ISS - BOX SECTION LTR
890C COMPOSITE DBCS/DIOSS BCS MODE
891 DBCS/DIOSS BCS O/G PRIMARY LTR
892 DBCS/DIOSS BCS O/G SECONDARY LTR
893 DBCS/DIOSS BCS MANAGED MAIL LTR
894 DBCS/DIOSS BCS I/C SCF PRIMARY LTR
895 DBCS/DIOSS BCS I/C PRIMARY LTR
896 DBCS/DIOSS BCS I/C SECONDARY LTR
897 DBCS/DIOSS BCS BOX SECTION LTR
898 DBCS/DIOSS BCS SEC/SEG, 1ST PASS LTR
899 DBCS/DIOSS BCS SEC/SEG, 2ND PASS LTR
908C COMPOSITE CSBCS
908 CSBCS - SECTOR SEGMENT LTR
909 CSBCS - INCOMING SECONDARY LTR
910 CSBCS - BOX MAIL LTR
911 CSBCS - DELIVERY POINT SEQUENCE DPS LTR
914 MPBCS - DELIVERY POINT SEQUENCE, 1ST PASS LTR
915 MPBCS - DELIVERY POINT SEQUENCE, 2ND PASS LTR
918 DBCS/DIOSS BCS DPS, 1ST PASS LTR
919 DBCS/DIOSS BCS DPS, 2ND PASS LTR
960C COMPOSITE - DIOSS BULKY OCR MODE
961 DIOSS BULKY OCR MODE - OUTGOING PRIMARY LTR
962 DIOSS BULKY OCR MODE - OUTGOING SECONDARY LTR
963 DIOSS BULKY OCR MODE - MANAGED MAIL LTR
964 DIOSS BULKY OCR MODE - INCOMING SCF PRIMARY LTR
965 DIOSS BULKY OCR MODE - INCOMING PRIMARY LTR
966 DIOSS BULKY OCR MODE - INCOMING SECONDARY LTR
967 DIOSS BULKY OCR MODE - BOX SECTION LTR
970C COMPOSITE - BAR CODE OUTPUT SUB SYSTEM
971 BCS - OSS-OUTGOING PRIMARY LTR
972 BCS - OSS-OUTGOING SECONDARY LTR
973 BCS - OSS-MANAGED MAIL LTR
974 BCS - OSS-INCOMING SCF LTR
975 BCS - OSS-INCOMING PRIMARY LTR
976 BCS - OSS-INCOMING SECONDARY LTR
977 BCS - OSS-BOX SECTION LTR


“Customer Services” Codes - Operations at Delivery Plants

048 ISS - RETURN TO SENDER LTR
049 OSS - RETURN TO SENDER LTR
252 CSBCS - OUTGOING PRIMARY LTR
253 CSBCS - INCOMING PRIMARY LTR
360C COMPOSITE - DBCS/DIOSS-OCR MODE (361-367)
361 DBCS/DIOSS OCR O/G PRIMARY LTR
362 DBCS/DIOSS OCR O/G SECONDARY LTR
363 DBCS/DIOSS OCR RESERVED LTR
364 DBCS/DIOSS OCR I/C SCF PRIMARY LTR
365 DBCS/DIOSS OCR I/C PRIMARY LTR
366 DBCS/DIOSS OCR I/C SECONDARY LTR
367 DBCS/DIOSS OCR BOX SECTION LTR
368 DBCS/DIOSS OCR RESERVED LTR
369 DBCS/DIOSS OCR RESERVED LTR
370C COMPOSITE DBCS/DIOSS OSS MODE (371-379, 942, 943)
371 DBCS/DIOSS OSS O/G PRIMARY LTR
372 DBCS/DIOSS OSS O/G SECONDARY LTR
373 DBCS/DIOSS OSS RESERVED LTR
374 DBCS/DIOSS OSS I/C SCF PRIMARY LTR
375 DBCS/DIOSS OSS I/C PRIMARY LTR
376 DBCS/DIOSS OSS I/C SECONDARY LTR
377 DBCS/DIOSS OSS BOX SECTION LTR
390C COMPOSITE DBCS/DIOSS-ISS MODE (391-397)
391 DBCS/DIOSS ISS O/G PRIMARY LTR
392 DBCS/DIOSS ISS O/G SECONDARY LTR
393 DBCS/DIOSS ISS RESERVED LTR
394 DBCS/DIOSS ISS I/C SCF PRIMARY LTR
395 DBCS/DIOSS ISS I/C PRIMARY LTR
396 DBCS/DIOSS ISS I/C SECONDARY LTR
397 DBCS/DIOSS ISS BOX SECTION LTR
410C CS UFSM 1000 COMPOSITE
411 CS UFSM 1000 OCR - OUTGOING PRIMARY FLT
412 CS UFSM 1000 OCR - OUTGOING SECONDARY FLT
413 CS UFSM 1000 OCR - MANAGED MAIL FLT
414 CS UFSM 1000 OCR - INCOMING SCF FLT
415 CS UFSM 1000 OCR - INCOMING PRIMARY FLT
416 CS UFSM 1000 OCR - INCOMING SECONDARY FLT
417 CS UFSM 1000 OCR - BOXED SECTION FLT
605 MAILER VALIDATION CREDITS FHP, TPH LTR
800C COMPOSITE - UFSM 1000 - Station and Branch
801 UFSM 1000 -KEYING - OUTGOING PRIMARY FLT
802 UFSM 1000 -KEYING - OUTGOING SECONDARY FLT
803 UFSM 1000 -KEYING - MANAGED MAIL FLT
804 UFSM 1000 -KEYING - INCOMING SCF FLT
805 UFSM 1000 -KEYING - INCOMING PRIMARY FLT
806 UFSM 1000 -KEYING - INCOMING SECONDARY FLT
807 UFSM 1000 -KEYING - BOX SECTION FLT
820C COMPOSITE DBCS/DIOSS/MPBCS BCS MODE
821 DBCS/DIOSS/MPBCS BCS O/G PRIMARY LTR
822 DBCS/DIOSS/MPBCS BCS O/G SECONDARY LTR
824 DBCS/DIOSS/MPBCS BCS I/C SCF PRIMARY LTR
825 DBCS/DIOSS/MPBCS BCS I/C PRIMARY LTR
826 DBCS/DIOSS/MPBCS BCS I/C SECONDARY LTR
827 DBCS/DIOSS/MPBCS BCS BOX SECTION LTR
828 DBCS/DIOSS/MPBCS BCS S/S,1ST PASS LTR
829 DBCS/DIOSS/MPBCS BCS S/S,2ND PASS LTR
839 MLOCR DESTINATING LTR
905 CSBCS - DPS LTR
906 CSBCS - INCOMING SECONDARY LTR
912 DBCS/DIOSS/MPBCS BCS DPS,1ST PASS LTR
913 DBCS/DIOSS/MPBCS BCS DPS,2ND PASS LTR


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


Confirm Stop-the-Clock Operation Codes

Note: The list is updated periodically and provided on the Mail Tracking and Reporting (MT&R) Web site at http://mailtracking.usps.com ; logon to the Web site as an “Existing User”; click on Confirm; then click on Confirm Resources; and then click on Confirm Reference Data Tables.

Code Mail Shape Description
146 FLT AFSM 100 - ATHS / AI - INCOMING SECONDARY
147 FLT AFSM 100 - ATHS / AI - BOX SECTION
336 FLT AFSM100 - INCOMING SECONDARY
337 FLT AFSM100 - BOX SECTION
406 FLT AFSM 100 - ATHS - INCOMING SECONDARY
407 FLT AFSM 100 - ATHS - BOX SECTION
446 FLT UFSM1000-KEYING - INCOMING SECONDARY
447 FLT UFSM1000-KEYING - BOX SECTION
466 FLT AFSM 100 - AI -INCOMING SECONDARY
467 FLT AFSM 100 - AI -BOXED MAIL
806 FLT UFSM 1000 - KEYING - INCOMING SECONDARY
807 FLT UFSM 1000 -KEYING - BOX SECTION
816 FLT UFSM 1000 OCR - INCOMING SECONDARY
817 FLT UFSM 1000 OCR - BOX SECTION
877 LTR MPBCS-BOX SECTION
879 LTR MPBCS-SECTOR/SEGMENT, 2ND PASS
905 LTR CSBCS - DPS
911 LTR CSBCS - DELIVERY POINT SEQUENCE DPS
912 LTR DBCS/DIOSS/MPBCS BCS DPS, 1ST PASS
913 LTR DBCS/DIOSS/MPBCS BCS DPS, 2ND PASS
914 LTR MPBCS - DELIVERY POINT SEQUENCE, 1ST PASS
915 LTR MPBCS - DELIVERY POINT SEQUENCE, 2ND PASS
918 LTR DBCS/DIOSS BCS DPS, 1ST PASS
919 LTR DBCS/DIOSS BCS DPS, 2ND PASS
977 LTR BCS-OSS-BOX SECTION