% 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:       199.33.135.0 - 199.33.135.255
CIDR:           199.33.135.0/24
NetName:        MSA-C
NetHandle:      NET-199-33-135-0-1
Parent:         NET199 (NET-199-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   Management Science Associates, Inc. (MSA)
RegDate:        1994-01-07
Updated:        2025-08-19
Ref:            https://rdap.arin.net/registry/ip/199.33.135.0

OrgName:        Management Science Associates, Inc.
OrgId:          MSA
Address:        400 MSA Dr
City:           Tarentum
StateProv:      PA
PostalCode:     15084
Country:        US
RegDate:        1994-01-07
Updated:        2025-09-10
Ref:            https://rdap.arin.net/registry/entity/MSA

OrgAbuseHandle: TCA42-ARIN
OrgAbuseName:   Carrier, Timothy 
OrgAbusePhone:  +1-412-362-2000 
OrgAbuseEmail:  msa-itss-security-admins@msa.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/TCA42-ARIN

OrgTechHandle: TCA42-ARIN
OrgTechName:   Carrier, Timothy 
OrgTechPhone:  +1-412-362-2000 
OrgTechEmail:  msa-itss-security-admins@msa.com
OrgTechRef:    https://rdap.arin.net/registry/entity/TCA42-ARIN

OrgTechHandle: CDM37-ARIN
OrgTechName:   McCarthy, Chris David
OrgTechPhone:  +1-724-265-6500 
OrgTechEmail:  cmccarthy@msa.com
OrgTechRef:    https://rdap.arin.net/registry/entity/CDM37-ARIN

OrgTechHandle: MIHOC3-ARIN
OrgTechName:   Mihoci, Rich 
OrgTechPhone:  +1-412-362-2000 
OrgTechEmail:  rmihoci@msa.com
OrgTechRef:    https://rdap.arin.net/registry/entity/MIHOC3-ARIN

OrgTechHandle: SWEEN55-ARIN
OrgTechName:   Sweeney, Jeffrey 
OrgTechPhone:  +1-412-924-3052 
OrgTechEmail:  jsweeney@msa.com
OrgTechRef:    https://rdap.arin.net/registry/entity/SWEEN55-ARIN

OrgTechHandle: JJN10-ARIN
OrgTechName:   Nowakowski, Jonathan James
OrgTechPhone:  +1-412-362-2000 
OrgTechEmail:  jnowakowski@msa.com
OrgTechRef:    https://rdap.arin.net/registry/entity/JJN10-ARIN

OrgTechHandle: SEWOC-ARIN
OrgTechName:   Sewock, Rich 
OrgTechPhone:  +1-412-362-2000 
OrgTechEmail:  rsewock@msa.com
OrgTechRef:    https://rdap.arin.net/registry/entity/SEWOC-ARIN

OrgTechHandle: RECKA5-ARIN
OrgTechName:   Reck, Austin 
OrgTechPhone:  +1-412-362-2000 
OrgTechEmail:  MSA-ITSS-Security-Admins@msa.com
OrgTechRef:    https://rdap.arin.net/registry/entity/RECKA5-ARIN

OrgAbuseHandle: SEWOC-ARIN
OrgAbuseName:   Sewock, Rich 
OrgAbusePhone:  +1-412-362-2000 
OrgAbuseEmail:  rsewock@msa.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/SEWOC-ARIN

RTechHandle: TCA42-ARIN
RTechName:   Carrier, Timothy 
RTechPhone:  +1-412-362-2000 
RTechEmail:  msa-itss-security-admins@msa.com
RTechRef:    https://rdap.arin.net/registry/entity/TCA42-ARIN

RTechHandle: SEWOC-ARIN
RTechName:   Sewock, Rich 
RTechPhone:  +1-412-362-2000 
RTechEmail:  rsewock@msa.com
RTechRef:    https://rdap.arin.net/registry/entity/SEWOC-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.
#