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To assist you with debugging problems, this whois query was received from IP Address

% 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 1997-2024, American Registry for Internet Numbers, Ltd.
#

NetRange:       151.207.0.0 - 151.207.255.255
CIDR:           151.207.0.0/16
NetName:        PTONET
NetHandle:      NET-151-207-0-0-1
Parent:         RIPE-ERX-151 (NET-151-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   United States Patent and Trademark Office (USPTO)
RegDate:        1991-09-25
Updated:        2023-04-03
Comment:        -----BEGIN CERTIFICATE-----
Comment:        MIIDiTCCAnGgAwIBAgIUO6K8U+IDrDqZLUaySauQmE8fk8YwDQYJKoZIhvcNAQEL
Comment:        BQAwVDELMAkGA1UEBhMCVVMxETAPBgNVBAgMCFZpcmdpbmlhMRMwEQYDVQQHDApB
Comment:        bGV4YW5kcmlhMQ4wDAYDVQQKDAVVU1BUTzENMAsGA1UECwwEU1NCMjAeFw0yMzAz
Comment:        MjEyMDU3MjZaFw0yMzA5MTcyMDU3MjZaMFQxCzAJBgNVBAYTAlVTMREwDwYDVQQI
Comment:        DAhWaXJnaW5pYTETMBEGA1UEBwwKQWxleGFuZHJpYTEOMAwGA1UECgwFVVNQVE8x
Comment:        DTALBgNVBAsMBFNTQjIwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC0
Comment:        Yj59VD5HuZVRl5x466MOkrBzhA/baB/m0uyWhAEYPg7b1d4DunIEh/nzdHj6tc95
Comment:        Ohy+pfLDBdE3wwaHB/zxlWzIkYvvt+IO2kF049yP+qKMnsYprbtQnXCzloTg1ytI
Comment:        kM3PX7F79kOBh5BRuJ2mOjQZ1+e4Tp5O2FnXZqEgWuYyD9HPt5IODXtFsYP9wDdu
Comment:        kaElczVJZz4CwbGuB7M3tyhmppdStwqxnwYL/p1tsnpppNdVBZLzssEHJPUMG47o
Comment:        qu4YAkXV40iXTiR8/VfXEt21N4IyBbyfNQaZko+07r8u76px4L1qJ3Bm9+9/1QNF
Comment:        Ig94I2k+hNgbG7JSwGYdAgMBAAGjUzBRMB0GA1UdDgQWBBQER76VqriLZQPICYqC
Comment:        yaX/vGpzdzAfBgNVHSMEGDAWgBQER76VqriLZQPICYqCyaX/vGpzdzAPBgNVHRMB
Comment:        Af8EBTADAQH/MA0GCSqGSIb3DQEBCwUAA4IBAQCVU8Pl+tzxeNtPRblxFY+UZBYP
Comment:        F9CwR1lMGBpQoEiLgrLrk0fPyGM0cLTDUKCNSDAxSRfm6eRipT2XTFPmd/+Y+061
Comment:        doG+EA8zwR+66xbxaBldH/NzPp5ymDJ/eD2kqHqwVfI/+2o2Rw1h7IArZDIek5+d
Comment:        h1A2pzlmDxRfmLXM3rktF4xpAZCQkku/smBmNV2mVmkkXrKLmB1TU1opxC5pPGze
Comment:        XK4XAnLGq1d7xAbG46iJm+3Ift9PCNhmU60V8tY03kofIn9jVMYDfL8iq7gHNtPY
Comment:        pohGpm3G2/caAjvxm2Jpq0b/17cpUBCBRPQKDeXc1OTvzlOPAU6ujlxt3BSR
Comment:        -----END CERTIFICATE-----
Ref:            https://rdap.arin.net/registry/ip/151.207.0.0

OrgName:        United States Patent and Trademark Office
OrgId:          USPTO
Address:        600 Dulaney Street
City:           Alexandria
StateProv:      VA
PostalCode:     22314
Country:        US
RegDate:        1995-09-20
Updated:        2024-01-23
Ref:            https://rdap.arin.net/registry/entity/USPTO

OrgTechHandle: KEL17-ARIN
OrgTechName:   Lear, Karen Elizabeth
OrgTechPhone:  +1-571-272-5314 
OrgTechEmail:  karen.mcghee@uspto.gov
OrgTechRef:    https://rdap.arin.net/registry/entity/KEL17-ARIN

OrgAbuseHandle: CWO91-ARIN
OrgAbuseName:   Chief Watch Officer
OrgAbusePhone:  +1-571-272-6700 
OrgAbuseEmail:  abuse@uspto.gov
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CWO91-ARIN

OrgDNSHandle: KEL17-ARIN
OrgDNSName:   Lear, Karen Elizabeth
OrgDNSPhone:  +1-571-272-5314 
OrgDNSEmail:  karen.mcghee@uspto.gov
OrgDNSRef:    https://rdap.arin.net/registry/entity/KEL17-ARIN

OrgRoutingHandle: NAT41-ARIN
OrgRoutingName:   N-Wave ARIN Tech
OrgRoutingPhone:  +1-812-856-7477 
OrgRoutingEmail:  nwave-arin-tech@noaa.gov
OrgRoutingRef:    https://rdap.arin.net/registry/entity/NAT41-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 1997-2024, American Registry for Internet Numbers, Ltd.
#
  • Bold: Object type.
  • Underlined: Primary key(s).
  • Hyperlinks: Searchable Attributes.
8 records found for '151.207.250.51'
Search for  
IP address lookups Miscellaneous queries
-l

1st level less specific

 Returns smallest IP address range that includes the queried IP address or range

-i

Inverse attributes

 Returns objects with an attribute that matches the query text and attribute type
-L

All less specific

 Return all larger IP address ranges that include the queried IP address or range

-T

Object types

 Results that match the query and are of a specified object type
-m

1st level more specific

 Returns first level more specific address ranges within the boundaries of the queried IP address range
-M

All more specific

 Returns all more specific address ranges within the boundaries of the queried IP address range

Query hints

  • Include "AS" in front of an AS number.
    Example: AS4808

  • Include "-t" (template only) or "-v" (template and description) in front of an object name to view the template
    Example: -t inetnum

-x

Exact match only

 Returns address range that exactly matches the queried IP address range
-d

Associated reverse domain

 Returns IP address range and associated reverse domain

For more information see: