% APNIC found the following authoritative answer from: whois.arin.net

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

NetRange:       138.67.0.0 - 138.67.255.255
CIDR:           138.67.0.0/16
NetName:        CSM-NET
NetHandle:      NET-138-67-0-0-1
Parent:         NET138 (NET-138-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   Colorado School of Mines (CSM-Z)
RegDate:        1990-02-25
Updated:        2023-12-29
Ref:            https://rdap.arin.net/registry/ip/138.67.0.0

OrgName:        Colorado School of Mines
OrgId:          CSM-Z
Address:        Computing Center
Address:        1500 Illinois Street
City:           Golden
StateProv:      CO
PostalCode:     80401
Country:        US
RegDate:        2023-10-04
Updated:        2023-10-04
Ref:            https://rdap.arin.net/registry/entity/CSM-Z

OrgNOCHandle: PRR-ARIN
OrgNOCName:   Romig, Phillip R
OrgNOCPhone:  +1-303-273-3866 
OrgNOCEmail:  promig3@mines.edu
OrgNOCRef:    https://rdap.arin.net/registry/entity/PRR-ARIN

OrgAbuseHandle: PRR-ARIN
OrgAbuseName:   Romig, Phillip R
OrgAbusePhone:  +1-303-273-3866 
OrgAbuseEmail:  promig3@mines.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/PRR-ARIN

OrgTechHandle: HENDR304-ARIN
OrgTechName:   Hendricks, George 
OrgTechPhone:  +1-303-273-3000 
OrgTechEmail:  ghendricks@mines.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/HENDR304-ARIN

OrgNOCHandle: HENDR304-ARIN
OrgNOCName:   Hendricks, George 
OrgNOCPhone:  +1-303-273-3000 
OrgNOCEmail:  ghendricks@mines.edu
OrgNOCRef:    https://rdap.arin.net/registry/entity/HENDR304-ARIN

OrgAbuseHandle: HENDR304-ARIN
OrgAbuseName:   Hendricks, George 
OrgAbusePhone:  +1-303-273-3000 
OrgAbuseEmail:  ghendricks@mines.edu
OrgAbuseRef:    https://rdap.arin.net/registry/entity/HENDR304-ARIN

OrgTechHandle: PRR-ARIN
OrgTechName:   Romig, Phillip R
OrgTechPhone:  +1-303-273-3866 
OrgTechEmail:  promig3@mines.edu
OrgTechRef:    https://rdap.arin.net/registry/entity/PRR-ARIN

RAbuseHandle: HENDR304-ARIN
RAbuseName:   Hendricks, George 
RAbusePhone:  +1-303-273-3000 
RAbuseEmail:  ghendricks@mines.edu
RAbuseRef:    https://rdap.arin.net/registry/entity/HENDR304-ARIN

RTechHandle: PRR-ARIN
RTechName:   Romig, Phillip R
RTechPhone:  +1-303-273-3866 
RTechEmail:  promig3@mines.edu
RTechRef:    https://rdap.arin.net/registry/entity/PRR-ARIN

RNOCHandle: HENDR304-ARIN
RNOCName:   Hendricks, George 
RNOCPhone:  +1-303-273-3000 
RNOCEmail:  ghendricks@mines.edu
RNOCRef:    https://rdap.arin.net/registry/entity/HENDR304-ARIN

RAbuseHandle: PRR-ARIN
RAbuseName:   Romig, Phillip R
RAbusePhone:  +1-303-273-3866 
RAbuseEmail:  promig3@mines.edu
RAbuseRef:    https://rdap.arin.net/registry/entity/PRR-ARIN

RTechHandle: HENDR304-ARIN
RTechName:   Hendricks, George 
RTechPhone:  +1-303-273-3000 
RTechEmail:  ghendricks@mines.edu
RTechRef:    https://rdap.arin.net/registry/entity/HENDR304-ARIN

RNOCHandle: PRR-ARIN
RNOCName:   Romig, Phillip R
RNOCPhone:  +1-303-273-3866 
RNOCEmail:  promig3@mines.edu
RNOCRef:    https://rdap.arin.net/registry/entity/PRR-ARIN

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#