21–
Kody w prefiksie 21–
98 kodów
| Kod | Miasto | Adr. | Ulic |
|---|---|---|---|
| 21-002 | Marysin | 2 951 | 91 |
| 21-003 | Dys | 3 872 | 120 |
| 21-007 | Franciszków | 3 535 | 88 |
| 21-008 | Dąbrowica | 2 040 | 42 |
| 21-010 | Łęczna | 3 669 | 94 |
| 21-011 | Łęczna | 1 | 1 |
| 21-013 | Puchaczów | 2 744 | 21 |
| 21-017 | Łęczna | 4 | 4 |
| 21-020 | Milejów-Osada | 2 957 | 29 |
| 21-025 | Niemce | 4 158 | 33 |
| 21-030 | Konopnica | 4 477 | 2 |
| 21-040 | Świdnik | 7 468 | 313 |
| 21-044 | Biskupice | 3 256 | 10 |
| 21-045 | Świdnik | 2 | 1 |
| 21-047 | Świdnik | 189 | 52 |
| 21-050 | Piaski | 3 907 | 43 |
| 21-060 | Fajsławice | 1 918 | 1 |
| 21-065 | Izdebno | 1 395 | 1 |
| 21-070 | Cyców | 2 589 | 22 |
| 21-075 | Ludwin | 649 | 4 |
| 21-077 | Kijany-Kolonia | 2 213 | 1 |
| 21-080 | Garbów | 3 024 | 63 |
| 21-100 | Lubartów | 9 289 | 162 |
| 21-102 | Leszkowice | 1 526 | 1 |
| 21-104 | Niedźwiada | 2 277 | 2 |
| 21-105 | Baranów | 2 | 2 |
| 21-107 | Serniki | 1 714 | 7 |
| 21-109 | Krasne | 1 633 | 3 |
| 21-110 | Ostrów Lubelski | 2 570 | 73 |
| 21-115 | Nowe Białobrzegi | 1 | 1 |
| 21-132 | Kamionka | 2 828 | 35 |
| 21-136 | Firlej | 2 648 | 37 |
| 21-140 | Michów | 2 502 | 38 |
| 21-143 | Abramów | 1 523 | 11 |
| 21-145 | Borki | 1 | 1 |
| 21-146 | Jeziorzany | 1 072 | 14 |
| 21-147 | Wola Osowińska | 1 | 1 |
| 21-150 | Kock | 2 675 | 41 |
| 21-200 | Parczew | 4 138 | 105 |
| 21-203 | Kąkolewnica | 1 | 1 |
| 21-205 | Jabłoń | 1 295 | 18 |
| 21-210 | Milanów | 1 461 | 14 |
| 21-211 | Białka | 2 039 | 26 |
| 21-220 | Siemień-Kolonia | 1 735 | 14 |
| 21-222 | Podedwórze | 707 | 1 |
| 21-225 | Horodyszcze | 1 | 1 |
| 21-230 | Sosnowica | 1 640 | 25 |
| 21-300 | Radzyń Podlaski | 5 921 | 112 |
| 21-302 | Kąkolewnica | 2 620 | 26 |
| 21-303 | Szóstka | 1 | 1 |
| 21-305 | Suchowola | 242 | 3 |
| 21-306 | Czemierniki | 1 741 | 19 |
| 21-307 | Ulan-Majorat | 1 916 | 3 |
| 21-310 | Wohyń | 2 352 | 41 |
| 21-311 | Komarówka Podlaska | 1 783 | 21 |
| 21-315 | — | 1 | 1 |
| 21-345 | Wola Osowińska | 2 155 | 22 |
| 21-350 | Rzeczyca | 82 | 15 |
| 21-400 | Łuków | 12 988 | 241 |
| 21-404 | Mikłusy | 2 618 | 3 |
| 21-405 | Zembry | 1 | 1 |
| 21-411 | Wojcieszków | 2 321 | 28 |
| 21-412 | Adamów | 1 946 | 39 |
| 21-413 | Serokomla | 1 595 | 25 |
| 21-421 | Sarnów | 2 821 | 1 |
| 21-422 | Stanin | 275 | 1 |
| 21-426 | Mysłów | 1 712 | 1 |
| 21-450 | Stoczek Łukowski | 3 366 | 52 |
| 21-470 | Krzywda | 2 609 | 72 |
| 21-480 | Okrzeja | 743 | 40 |
| 21-481 | Wola Gułowska | 130 | 1 |
| 21-500 | Biała Podlaska | 19 764 | 455 |
| 21-501 | Biała Podlaska | 1 | 1 |
| 21-504 | Rokitno | 1 125 | 2 |
| 21-505 | Janów Podlaski | 2 421 | 53 |
| 21-507 | Pratulin | 1 | 1 |
| 21-509 | Kodeń Drugi | 1 611 | 24 |
| 21-512 | Zalesie | 1 726 | 20 |
| 21-513 | Malowa Góra | 1 | 1 |
| 21-514 | Neple | 1 | 1 |
| 21-515 | Sławatycze | 1 248 | 18 |
| 21-518 | Motwica | 1 038 | 1 |
| 21-523 | Tuczna | 1 448 | 1 |
| 21-526 | Jabłeczna | 2 | 1 |
| 21-530 | Piszczac | 2 506 | 60 |
| 21-532 | Łomazy | 2 215 | 35 |
| 21-533 | Rossosz | 917 | 17 |
| 21-534 | Huszcza Druga | 1 | 1 |
| 21-536 | Swory | 3 | 2 |
| 21-540 | Małaszewicze | 924 | 46 |
| 21-542 | Leśna Podlaska | 1 519 | 16 |
| 21-543 | Konstantynów | 1 307 | 28 |
| 21-550 | Terespol | 1 611 | 63 |
| 21-555 | Terespol | 1 | 1 |
| 21-560 | Międzyrzec Podlaski | 6 393 | 151 |
| 21-564 | Tłuściec | 127 | 1 |
| 21-570 | Drelów | 2 207 | 24 |
| 21-580 | Wisznice | 2 011 | 37 |