Caves with the following numbers were not explored by CUCC, though those we have come across and can find again are recorded in the "known caves" table.
| 1-40, 42-60, 72-75, 77-79 | 'Austrian' caves. |
| 41 | Austrian discovery pushed by a German group, but main exploration by CUCC, so included as "one of ours". |
| 88 | a 'German' cave - except see below |
| 116-130 | 'German' caves |
| 131-134 | 'Austrian' caves, out near Wildensee |
| 166-170 | not our numbers |
| 202, 203, 206 | used for Arge finds |
| 211-213, 221 | not our numbers |
| 236 onwards | numbers not yet allocated (as of summer 2003) |
The following caves have, for one reason or another, been misnumbered by CUCC members over the years. We make no claims that these are the only cockups that may have occurred.
| 88 | Numbered in red, but didn't go. Number reused by Austrians (for a significant cave explored by a German group). Allegedly this number was changed to 87A or 87B, but in fact this is not the case and this number needs to be removed. |
| 106 | This was a number which we were entitled to use, and which we applied to a significant find. However, the cave was written up in a non-CUCC publication which went to the Austrians, who allocated this cave their own number as a result. This makes a lot of CUCC documentation confusing, but the net result is that it is not our number anymore. We believe that the Austrians have not reused it, but there is no guarantee that they won't. |
| 114 | This cave is completely missing! (found in 1980, but no record was published - the logbook is missing) |
| 185 | Apart from 2 Year Gestation Höhle (on the col en route to 161a) which is correctly numbered 185, there were two other caves erroneously numbered "185", one of which is undocumented 90/15, which needs surveying and a real number. The other is really 186, whose marking was later fixed. |
| 234, 235 | After the switch over to the new system whereby caves are given official numbers only on receipt of a form and survey, these numbers were used without permission for two caves in the vicinity of Eishöhle, on the grounds that it was highly unlikely that the numbers would be used by anyone else before the forms got sent in; the caves were thus tagged as such. However, the forms disappeared into the ether after being mistakenly posted to AERW instead of the Austrians. Later, when the next batch of caves were submitted to the Austrians for numbering, 235 was allocated to Hauchhöhle (2000-09). It is not known to what cave number 234 was actually allocated. It is intended that new kataster numbers be applied for for the caves currently tagged 234 and 235, and the tag 235 applied to Hauchhöhle, by the end of Expo 2004. |