IP1 — 11 codes dans 191 localités (Royaume-Uni).
| Code postal | Localité / Quartier | Zone administrative | Coordonnées |
|---|---|---|---|
| Akenham | Suffolk · England | 52.0713, 1.1444 | |
| Ipswich | Suffolk · England | 52.0592, 1.1555 | |
| Whitton | Suffolk · England | 52.0833, 1.1333 | |
| Castle Hill | Suffolk · England | 52.0713, 1.1444 | |
| Brightwell | Suffolk · England | 52.0431, 1.2768 | |
| Bucklesham | Suffolk · England | 52.0301, 1.2693 | |
| Falkenham | Suffolk · England | 52.0008, 1.3321 | |
| Kirton | Suffolk · England | 52.0083, 1.3194 | |
| Levington | Suffolk · England | 52.0059, 1.2523 | |
| Nacton | Suffolk · England | 52.0183, 1.2359 | |
| Trimley St Martin | Suffolk · England | 52.0194, 1.2683 | |
| Trimley St Mary | Suffolk · England | 52.0194, 1.2683 | |
| Walton | Suffolk · England | 51.9667, 1.35 | |
| Old Felixstowe | Suffolk · England | 51.9652, 1.3506 | |
| Felixstowe | Suffolk · England | 51.9638, 1.3511 | |
| Martlesham | Suffolk · England | 52.0738, 1.2821 | |
| Woodbridge | Suffolk · England | 52.0933, 1.3204 | |
| Waldringfield | Suffolk · England | 52.0527, 1.3253 | |
| Tunstall | Suffolk · England | 52.1437, 1.4465 | |
| Sutton | Suffolk · England | 52.0667, 1.35 | |
| Sudbourne | Suffolk · England | 52.1228, 1.5236 | |
| Shottisham | Suffolk · England | 52.0516, 1.3828 | |
| Shingle Street | Suffolk · England | 52.0535, 1.3639 | |
| Rendlesham | Suffolk · England | 52.1267, 1.4154 | |
| Ramsholt | Suffolk · England | 52.0236, 1.3625 | |
| Orford | Suffolk · England | 52.0957, 1.5345 | |
| Melton | Suffolk · England | 52.105, 1.3298 | |
| Newbourne | Suffolk · England | 52.0389, 1.3137 | |
| Iken | Suffolk · England | 52.1457, 1.5233 | |
| Butley | Suffolk · England | 52.1067, 1.4572 | |
| Hollesley | Suffolk · England | 52.0499, 1.4305 | |
| Alderton | Suffolk · England | 52.0246, 1.4148 | |
| Bawdsey | Suffolk · England | 52.0091, 1.4185 | |
| Blaxhall | Suffolk · England | 52.161, 1.4619 | |
| Bromeswell | Suffolk · England | 52.1071, 1.36 | |
| Boyton | Suffolk · England | 52.0715, 1.4682 | |
| Capel St Andrew | Suffolk · England | 52.0535, 1.3639 | |
| Chillesford | Suffolk · England | 52.1167, 1.4833 | |
| Eyke | Suffolk · England | 52.1157, 1.3825 | |
| Gedgrave Hall | Suffolk · England | 52.0535, 1.3639 | |
| Hemley | Suffolk · England | 52.0321, 1.329 | |
| High Street | Suffolk · England | 52.0946, 1.3711 | |
| Monewden | Suffolk · England | 52.1666, 1.295 | |
| Hasketon | Suffolk · England | 52.1077, 1.2813 | |
| Hoo | Suffolk · England | 52.1774, 1.2999 | |
| Kettleburgh | Suffolk · England | 52.1938, 1.3121 | |
| Laxfield | Suffolk · England | 52.3021, 1.3659 | |
| Letheringham | Suffolk · England | 52.1684, 1.3253 | |
| Little Bealings | Suffolk · England | 52.0824, 1.2528 | |
| Little Glemham | Suffolk · England | 52.1758, 1.4272 | |
| Marlesford | Suffolk · England | 52.1724, 1.4035 | |
| Ufford | Suffolk · England | 52.1268, 1.349 | |
| Monk Soham | Suffolk · England | 52.2452, 1.2371 | |
| Parham | Suffolk · England | 52.1955, 1.3742 | |
| Pettistree | Suffolk · England | 52.1428, 1.3619 | |
| Saxtead Green | Suffolk · England | 52.1666, 1.295 | |
| Saxtead Little Green | Suffolk · England | 52.1666, 1.295 | |
| Tannington | Suffolk · England | 52.2652, 1.2939 | |
| Wickham Market | Suffolk · England | 52.153, 1.363 | |
| Worlingworth | Suffolk · England | 52.2703, 1.27 | |
| Grundisburgh | Suffolk · England | 52.1122, 1.2462 | |
| Hacheston | Suffolk · England | 52.1714, 1.3745 | |
| Charsfield | Suffolk · England | 52.1596, 1.2971 | |
| Great Bealings | Suffolk · England | 52.0916, 1.2615 | |
| Burgh | Suffolk · England | 52.1163, 1.2584 | |
| Framlingham | Suffolk · England | 52.2212, 1.342 | |
| Bedfield | Suffolk · England | 52.259, 1.2488 | |
| Brabling Green | Suffolk · England | 52.1666, 1.295 | |
| Brandeston | Suffolk · England | 52.1971, 1.2842 | |
| Bredfield | Suffolk · England | 52.1277, 1.3142 | |
| Bruisyard | Suffolk · England | 52.2404, 1.4172 | |
| Badingham | Suffolk · England | 52.2635, 1.378 | |
| Brundish | Suffolk · England | 52.2782, 1.3212 | |
| Brundish Street | Suffolk · England | 52.1666, 1.295 | |
| Bruisyard Street | Suffolk · England | 52.1666, 1.295 | |
| Campsey Ash | Suffolk · England | 52.1519, 1.4003 | |
| Dennington | Suffolk · England | 52.2547, 1.3415 | |
| Easton | Suffolk · England | 52.1833, 1.35 | |
| Earl Soham | Suffolk · England | 52.2203, 1.2657 | |
| Fingal Street | Suffolk · England | 52.1666, 1.295 | |
| Debach | Suffolk · England | 52.1408, 1.2785 | |
| Dallinghoo | Suffolk · England | 52.1666, 1.295 | |
| Cretingham | Suffolk · England | 52.1957, 1.2582 | |
| Cransford | Suffolk · England | 52.2315, 1.3997 | |
| Little Finborough | Suffolk · England | 52.1581, 0.9589 | |
| Little Stonham | Suffolk · England | 52.2322, 1.0792 | |
| Mendlesham | Suffolk · England | 52.2501, 1.0813 | |
| Mendlesham Green | Suffolk · England | 52.2322, 1.0792 | |
| Mickfield | Suffolk · England | 52.2129, 1.1253 | |
| Middlewood Green | Suffolk · England | 52.2322, 1.0792 | |
| Old Newton | Suffolk · England | 52.2235, 1.0001 | |
| Pettaugh | Suffolk · England | 52.1914, 1.1712 | |
| Ringshall | Suffolk · England | 52.1333, 0.9833 | |
| Wyverstone Street | Suffolk · England | 52.2322, 1.0792 | |
| Stonham Aspal | Suffolk · England | 52.191, 1.1226 | |
| Stowmarket | Suffolk · England | 52.1889, 0.9977 | |
| Stowupland | Suffolk · England | 52.2005, 1.0254 | |
| Ward Green | Suffolk · England | 52.2322, 1.0792 | |
| Westhorpe | Suffolk · England | 52.2844, 0.9997 | |
| Wetherden | Suffolk · England | 52.231, 0.939 | |
| Wetheringsett | Suffolk · England | 52.257, 1.1148 | |
| Wetherup Street | Suffolk · England | 52.2322, 1.0792 | |
| Winston | Suffolk · England | 52.208, 1.1836 | |
| Wyverstone | Suffolk · England | 52.2705, 0.9903 | |
| High Street Green | Suffolk · England | 52.2322, 1.0792 | |
| Kenton | Suffolk · England | 52.25, 1.2 | |
| Debenham | Suffolk · England | 52.2242, 1.1817 | |
| Helmingham | Suffolk · England | 52.1756, 1.197 | |
| Cotton | Suffolk · England | 52.2632, 1.0319 | |
| Ashfield | Suffolk · England | 52.2187, 1.2348 | |
| Bacton | Suffolk · England | 52.2667, 1.0167 | |
| Battisford | Suffolk · England | 52.1473, 0.9734 | |
| Battisford Tye | Suffolk · England | 52.2322, 1.0792 | |
| Brockford Street | Suffolk · England | 52.2322, 1.0792 | |
| Buxhall | Suffolk · England | 52.1806, 0.9314 | |
| Charles Tye | Suffolk · England | 52.2322, 1.0792 | |
| Combs | Suffolk · England | 52.1644, 0.9777 | |
| Combs Ford | Suffolk · England | 52.2322, 1.0792 | |
| Aspall | Suffolk · England | 52.2449, 1.1756 | |
| Earl Stonham | Suffolk · England | 52.2322, 1.0792 | |
| Harleston | Suffolk · England | 52.2033, 0.9464 | |
| Earl's Green | Suffolk · England | 52.2322, 1.0792 | |
| Haughley Green | Suffolk · England | 52.2322, 1.0792 | |
| Haughley | Suffolk · England | 52.2191, 0.968 | |
| Haughley New Street | Suffolk · England | 52.2322, 1.0792 | |
| Great Finborough | Suffolk · England | 52.1807, 0.943 | |
| Finningham | Suffolk · England | 52.282, 1.0264 | |
| Framsden | Suffolk · England | 52.1908, 1.2106 | |
| Forward Green | Suffolk · England | 52.2322, 1.0792 | |
| Gipping | Suffolk · England | 52.2272, 1.0288 | |
| Aldeburgh | Suffolk · England | 52.1526, 1.6012 | |
| Slaughden | Suffolk · England | 52.1526, 1.6012 | |
| Thorpeness | Suffolk · England | 52.1801, 1.6133 | |
| Sizewell | Suffolk · England | 52.2036, 1.62 | |
| Theberton | Suffolk · England | 52.2378, 1.5668 | |
| Leiston | Suffolk · England | 52.2061, 1.5776 | |
| Coldfair Green | Suffolk · England | 52.2042, 1.591 | |
| Aldringham | Suffolk · England | 52.1932, 1.5776 | |
| East Bridge | Suffolk · England | 52.2042, 1.591 | |
| Poys Street | Suffolk · England | 52.2416, 1.5138 | |
| Yoxford | Suffolk · England | 52.2682, 1.5068 | |
| Westleton | Suffolk · England | 52.2647, 1.5746 | |
| Walberswick | Suffolk · England | 52.2305, 1.5018 | |
| Sweffling | Suffolk · England | 52.2416, 1.5138 | |
| Stratford St Andrew | Suffolk · England | 52.2416, 1.5138 | |
| Sternfield | Suffolk · England | 52.1958, 1.4972 | |
| Snape | Suffolk · England | 52.171, 1.5005 | |
| Sibton | Suffolk · England | 52.275, 1.4574 | |
| Saxmundham | Suffolk · England | 52.215, 1.488 | |
| Rendham | Suffolk · England | 52.2287, 1.439 | |
| Middleton | Suffolk · England | 52.254, 1.5575 | |
| Peasenhall | Suffolk · England | 52.2714, 1.4511 | |
| Knodishall | Suffolk · England | 52.1961, 1.553 | |
| Kelsale | Suffolk · England | 52.2322, 1.4913 | |
| Gromford | Suffolk · England | 52.2416, 1.5138 | |
| Great Glemham | Suffolk · England | 52.2045, 1.4245 | |
| Friston | Suffolk · England | 52.1833, 1.5333 | |
| Farnham | Suffolk · England | 52.1907, 1.4547 | |
| Dunwich | Suffolk · England | 52.2773, 1.632 | |
| Darsham | Suffolk · England | 52.2751, 1.5428 | |
| Church Common | Suffolk · England | 52.2416, 1.5138 | |
| Carlton | Suffolk · England | 52.2416, 1.5138 | |
| Southwold | Suffolk · England | 52.3275, 1.6798 | |
| Blackwater | Suffolk · England | 52.3306, 1.669 | |
| Reydon | Suffolk · England | 52.339, 1.6658 | |
| Huntingfield | Suffolk · England | 52.3127, 1.435 | |
| Westhall | Suffolk · England | 52.3773, 1.54 | |
| Wenhaston | Suffolk · England | 52.3265, 1.5563 | |
| Walpole | Suffolk · England | 52.318, 1.4689 | |
| Ubbeston Green | Suffolk · England | 52.3345, 1.4867 | |
| Thorington | Suffolk · England | 52.3123, 1.5488 | |
| Stone Street | Suffolk · England | 52.3345, 1.4867 | |
| St James South Elmham | Suffolk · England | 52.3345, 1.4867 | |
| Spexhall | Suffolk · England | 52.3684, 1.4926 | |
| Silverley's Green | Suffolk · England | 52.3345, 1.4867 | |
| Rumburgh | Suffolk · England | 52.3797, 1.4459 | |
| Linstead Parva | Suffolk · England | 52.3504, 1.4195 | |
| Chediston | Suffolk · England | 52.3481, 1.4615 | |
| Holton | Suffolk · England | 52.3468, 1.5259 | |
| Heveningham | Suffolk · England | 52.3025, 1.4197 | |
| Halesworth | Suffolk · England | 52.3464, 1.5029 | |
| Cratfield | Suffolk · England | 52.3245, 1.3949 | |
| Cox Common | Suffolk · England | 52.3345, 1.4867 | |
| Cookley | Suffolk · England | 52.3167, 1.45 | |
| Broadway | Suffolk · England | 52.3345, 1.4867 | |
| Bramfield | Suffolk · England | 52.3098, 1.5189 | |
| Blythburgh | Suffolk · England | 52.3204, 1.5968 | |
| Blyford | Suffolk · England | 52.3352, 1.5587 | |
| Blackheath | Suffolk · England | 52.3345, 1.4867 | |
| All Saints South Elmham | Suffolk · England | 52.3345, 1.4867 | |
| Wissett | Suffolk · England | 52.3611, 1.4732 |