1300-1339 are reserved for SHARES.
Here's what's currently in the schedule for mainline:
Code:
range | min | max | count
-------+------+------+-------
0 | 3 | 99 | 93
100 | 100 | 199 | 88
200 | 200 | 299 | 94
300 | 300 | 399 | 99
400 | 400 | 499 | 98
500 | 500 | 599 | 97
600 | 600 | 699 | 93
700 | 700 | 799 | 94
800 | 800 | 899 | 89
900 | 900 | 999 | 96
1000 | 1001 | 1099 | 98
1100 | 1100 | 1199 | 99
1200 | 1200 | 1299 | 99
1400 | 1400 | 1499 | 98
1500 | 1500 | 1599 | 99
1600 | 1600 | 1699 | 99
1700 | 1700 | 1799 | 99
1800 | 1800 | 1897 | 64
1900 | 1900 | 1999 | 98
2000 | 2000 | 2048 | 29
2100 | 2120 | 2123 | 4
2200 | 2205 | 2298 | 63
1800s are still charter AFAIK.