01633

01633
United Kingdom area code for Newport
01633
National calling	01633
International calling	+44 1633
Conservation	Yes^[1]
Active since	16 April 1995
Previous code(s)	0633
Number format	01633 xxxxxx
Coverage
Maesglas Savoy Chartist Maindee Rhiwderin Caerleon Castleton Cwmbran Machen Llanwern Magor Penhow Risca Tredunnock
Area served	Newport Cwmbran Machen Magor
List of United Kingdom codes

The 01633 telephone area code covers the city of Newport and surrounding areas in the United Kingdom. Before PhONEday the area code was 0633, which was originally dialled as "0NE3" where the "NE" were formed from the first two letters of NEwport on the telephone dial. In common with all other British area codes the initial '0' is a trunk prefix that is dropped when dialling from abroad.

Coverage

The 14 exchanges listed in the table below form the 01633 code area as of 2012:

Exchange		Premises
OLO code	Name	Residential	Business
SWNE/EX^[2]	Newport Savoy	20,967	1,620
SWNE/CH^[3]	Newport Chartist	8,852	190
SWMDE^[4]	Maindee	12,003	434
SWRWI^[5]	Rhiwderin	6,660	110
SWCAA^[6]	Caerleon	4,161	161
SWMES^[7]	Maesglas	3,666	90
SWUWN^[8]	Llanwern	2,153	62
SWCTE^[9]	Castleton	1,564	54
SWPHX^[10]	Penhow	786	47
SWMAD^[11]	Machen	1,227	28
SWRDX^[12]	Risca	5,009	234
SWCRS^[13]	Cwmbran	20,268	905
SWTUC^[14]	Tredunnock	355	25
SWMGR^[15]	Magor	2,477	99

History

The Group switching centre (GSC) for the Newport charge group was the Savoy exchange. This exchange alongside the Chartist, Maindee and Maesglas exchanges formed the Newport linked numbering scheme whereby local numbers could be dialled directly and with the STD code 0633. The surrounding dependent exchanges could be accessed via local codes and longer STD codes based on 0633.

Dependent exchanges

Smaller exchanges around the GSC were parented onto it. From them the digit 9 was dialled to access the GSC. The codes from the GSC to the dependent exchanges are listed in the table below:

Exchange	Local code	Original STD code
Cwmbran	3	063 33
Llanwern	41	063 341
Caerleon	42	063 342
Rhiwderin	43	063 343
Risca	44	063 344
Penhow	45	063 345
Machen	46	063 346
Magor	47	063 347
Castleton	48	063 348
Tredunnock	49	063 349

To dial from one dependent exchange to another one first dialled 9 to access the GSC then dialled the local code to the destination exchange. Thus a caller from Machen to Magor would dial 947 before the subscriber's number and a caller from Risca to Cwmbran would dial 93. A caller to a Newport number in the linked numbering scheme would simply dial 9.

Changes

Over time the local codes were abolished and the dependent exchanges became part of the linked numbering scheme. This meant the 3, 4 and 5-digit numbers became 6-digit numbers by means of a prefix that was unique in the 0633 code area.

By 1983 Llanwern 4-digit numbers (2000–3999) were prefixed with 41.
Caerleon 4-digit numbers were prefixed by 42. All were 6-digit by 1976.
Rhiwderin 4-digit numbers were prefixed by 89.
Risca 3-digit numbers were prefixed by 600 and 4-digit numbers prefixed by 61. All were 6-digit by 1974.
Penhow 3-digit numbers were prefixed with 400. All were 6-digit by 1983.
Machen 3-digit numbers were prefixed with 440. All were 6-digit by 1983.
Magor 3-digit numbers were prefixed with 880. All were 6-digit by 1983.
Castleton 3-digit numbers were prefixed with 680. All were 6-digit by 1979.
Tredunnock 3-digit numbers were prefixed with 450.
Cwmbran 4-digit numbers (2000–5999) were prefixed with 48 and 5-digit numbers (60000–79999) were prefixed with 8.

The remaining 5-digit numbers in the Newport area (50000–59999 and 62000–69999) were prefixed with 2 in 1990. Since then all numbers have been 6-digit and the previous prefixes have been reused by other communications providers.

References

↑ "The National Telephone Numbering Plan" (PDF). Ofcom. 31 May 2012. Archived from the original (PDF) on 2012-07-10.
↑ "Newport Savoy Exchange". Samknows. Retrieved 12 October 2012.
↑ "Newport Chartist Exchange". Samknows. Retrieved 12 October 2012.
↑ "Maindee Exchange". Samknows. Retrieved 12 October 2012.
↑ "Rhiwderin Exchange". Samknows. Retrieved 12 October 2012.
↑ "Caerleon Exchange". Samknows. Retrieved 12 October 2012.
↑ "Maesglas Exchange". Samknows. Retrieved 12 October 2012.
↑ "Llanwern Exchange". Samknows. Retrieved 12 October 2012.
↑ "Castleton Exchange". Samknows. Retrieved 12 October 2012.
↑ "Penhow Exchange". Samknows. Retrieved 12 October 2012.
↑ "Machen Exchange". Samknows. Retrieved 12 October 2012.
↑ "Risca Exchange". Samknows. Retrieved 12 October 2012.
↑ "Cwmbran Exchange". Samknows. Retrieved 12 October 2012.
↑ "Tredunnock Exchange". Samknows. Retrieved 12 October 2012.
↑ "Magor Exchange". Samknows. Retrieved 12 October 2012.

Telephone numbers in the United Kingdom

Number plan	List of dialling codes Non-geographic numbers

Number changes	All-figure dialling Area name changes Big Number Change Code misconceptions PhONEday

Special numbers	100 101 111 112 116000 116111 116123 118xxx 123 141 1471 150 155 1571 999

Geographic area codes	113 114 115 116 117 118 1200 1202 1204 1205 1206 1207 1208 1209 121 1223 1224 1225 1226 1227 1228 1229 1233 1234 1235 1236 1237 1239 1241 1242 1243 1244 1245 1246 1248 1249 1250 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1267 1268 1269 1270 1271 1273 1274 1275 1276 1277 1278 1279 1280 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 131 1320 1322 1323 1324 1325 1326 1327 1328 1329 1330 1332 1333 1334 1335 1337 1339 1340 1341 1342 1343 1344 1346 1347 1348 1349 1350 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1366 1367 1368 1369 1371 1372 1373 1375 1376 1377 1379 1380 1381 1382 1383 1384 1386 1387 13873 1388 1389 1392 1394 1395 1397 1398 1400 1403 1404 1405 1406 1407 1408 1409 141 1420 1422 1423 1424 1425 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1442 1443 1444 1445 1446 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1460 1461 1462 1463 1464 1465 1466 1467 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1499 1501 1502 1503 1505 1506 1507 1508 1509 151 1520 1522 1524 15242 1525 1526 1527 1528 1529 1530 1531 1534 1535 1536 1538 1539 15394 15395 15396 1540 1542 1543 1544 1545 1546 1547 1548 1549 1550 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1586 1588 1590 1591 1592 1593 1594 1595 1597 1598 1599 1600 1603 1604 1606 1608 1609 161 1620 1621 1622 1623 1624 1625 1626 1628 1629 1630 1631 1633 1634 1635 1636 1637 1638 1639 1641 1642 1643 1644 1646 1647 1650 1651 1652 1653 1654 1655 1656 1659 1661 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1680 1681 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1694 1695 1697 16973 16974 16977 1698 1700 1702 1704 1706 1707 1708 1709 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1732 1733 1736 1737 1738 1740 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1756 1757 1758 1759 1760 1761 1763 1764 1765 1766 1767 1768 17683 17684 17687 1769 1770 1771 1772 1773 1775 1776 1777 1778 1779 1780 1782 1784 1785 1786 1787 1788 1789 1790 1792 1793 1794 1795 1796 1797 1798 1799 1803 1805 1806 1807 1808 1809 1821 1822 1823 1824 1825 1827 1828 1829 1830 1832 1833 1834 1835 1837 1838 1840 1841 1842 1843 1844 1845 1847 1848 1851 1852 1854 1855 1856 1857 1858 1859 1862 1863 1864 1865 1866 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1882 1883 1884 1885 1886 1887 1888 1889 1890 1892 1895 1896 1899 1900 1902 1903 1904 1905 1908 1909 191 1920 1922 1923 1924 1925 1926 1928 1929 1931 1932 1933 1934 1935 1937 1938 1939 1942 1943 1944 1945 1946 19467 1947 1948 1949 1950 1951 1952 1953 1954 1955 1957 1959 1962 1963 1964 1967 1968 1969 1970 1971 1972 1974 1975 1977 1978 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1992 1993 1994 1995 1997 20 23 24 28 29

Non-geographic prefixes charged at geographic rate	300 302 303 306 330 331 332 333 342 343 344 345 370 371 372 373

Personal, pager, VoIP and corporate numbering	55 56 70 76

Mobile telephone prefixes	71xx 73xx 74xx 75xx 7624 77xx 78xx 79xx

Freephone prefixes	500 800 808

Non-geographic prefixes with revenue share (NTS)	842 843 844 845 870 871 872 873

Premium Rate Services (PRS)	900 901 902 903 904 905 906 907 911 912 913

Adult services (SES)	908 909 982 983 984 989

Coordinates: 51°35′37″N 2°59′55″W / 51.5937°N 2.9987°W / 51.5937; -2.9987

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