ASN CIDRs with str prefixes for joins

gistfile1.txt

+-----+-----------+--------+-----------+--------+----------+--------+-----------+
|  asn|       cidr|  ip_max| ip_max_str|  ip_min|ip_min_str| network|network_str|
+-----+-----------+--------+-----------+--------+----------+--------+-----------+
|56203| 1.0.4.0/24|16778495|  1.0.4.255|16778240|   1.0.4.0|16778240|    1.0.4.0|
|56203| 1.0.5.0/24|16778751|  1.0.5.255|16778496|   1.0.5.0|16778496|    1.0.5.0|
|56203| 1.0.6.0/24|16779007|  1.0.6.255|16778752|   1.0.6.0|16778752|    1.0.6.0|
|56203| 1.0.7.0/24|16779263|  1.0.7.255|16779008|   1.0.7.0|16779008|    1.0.7.0|
| 2519|1.0.20.0/23|16782847| 1.0.21.255|16782336|  1.0.20.0|16782336|   1.0.20.0|
| 2519|1.0.20.0/23|16782847| 1.0.21.255|16782336|  1.0.20.0|16782592|   1.0.21.0|
| 2519|1.0.22.0/23|16783359| 1.0.23.255|16782848|  1.0.22.0|16782848|   1.0.22.0|
| 2519|1.0.22.0/23|16783359| 1.0.23.255|16782848|  1.0.22.0|16783104|   1.0.23.0|
| 2519|1.0.24.0/23|16783871| 1.0.25.255|16783360|  1.0.24.0|16783360|   1.0.24.0|
| 2519|1.0.24.0/23|16783871| 1.0.25.255|16783360|  1.0.24.0|16783616|   1.0.25.0|
| 2519|1.0.26.0/23|16784383| 1.0.27.255|16783872|  1.0.26.0|16783872|   1.0.26.0|
| 2519|1.0.26.0/23|16784383| 1.0.27.255|16783872|  1.0.26.0|16784128|   1.0.27.0|
| 2519|1.0.28.0/22|16785407| 1.0.31.255|16784384|  1.0.28.0|16784384|   1.0.28.0|
| 2519|1.0.28.0/22|16785407| 1.0.31.255|16784384|  1.0.28.0|16784640|   1.0.29.0|
| 2519|1.0.28.0/22|16785407| 1.0.31.255|16784384|  1.0.28.0|16784896|   1.0.30.0|
| 2519|1.0.28.0/22|16785407| 1.0.31.255|16784384|  1.0.28.0|16785152|   1.0.31.0|
+-----+-----------+--------+-----------+--------+----------+--------+-----------+