What is ASN AS133555?

ASN AS133555 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS133555?

AS133555 is listed under DOORPOST Limited.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS133555 DOORPOST Limited | IPGeolocation.io

ASN Lookup Tool

DOORPOST Limited zhangcheng.org

CN 8 Routes

AS Data

AS133555

AS133555 – DOORPOST Limited

AS Number	133555
AS Name	DOORPOST-AS-AP
Organization	DOORPOST Limited (org-dl38-ap)
Country	CN
Website	zhangcheng.org
Number of IPv4 Routes	1
Number of IPv6 Routes	7
ASN type	ISP
Registry	APNIC
Date Allocated	N/A

ASN Intelligence API for production workflows

Use ASN data for AS133555 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
2a06:a005:280::/44	AS133555	DOORPOST Limited	DOORPOST Asia	~19×10²⁴
2406:840:fefc::/48	AS133555	DOORPOST Limited	Ningbo Dahuamao Information Technology Co Ltd	~1×10²⁴
2a06:a005:2a0::/44	AS133555	DOORPOST Limited	DOORPOST Africa	~19×10²⁴
2a06:a005:290::/44	AS133555	DOORPOST Limited	DOORPOST America	~19×10²⁴
44.31.216.0/24	AS133555	DOORPOST Limited	Amateur Radio Digital Communications	256
2a06:a005:270::/44	AS133555	DOORPOST Limited	DOORPOST Europe	~19×10²⁴
2406:840:f380::/44	AS133555	DOORPOST Limited	DOORPOST Limited	~19×10²⁴
2a06:a005:260::/44	AS133555	DOORPOST Limited	DOORPOST International	~19×10²⁴

Raw Whois Response

% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS133120 - AS133631'

as-block:       AS133120 - AS133631
descr:          APNIC ASN block
remarks:        These AS numbers are further assigned by APNIC
remarks:        to APNIC members and end-users in the APNIC region
admin-c:        HM20-AP
tech-c:         HM20-AP
mnt-by:         APNIC-HM
mnt-lower:      APNIC-HM
last-modified:  2013-09-11T23:52:15Z
source:         APNIC

role:           APNIC Hostmaster
address:        6 Cordelia Street
address:        South Brisbane
address:        QLD 4101
country:        AU
phone:          +61 7 3858 3100
fax-no:         +61 7 3858 3199
e-mail:         helpdesk@apnic.net
admin-c:        AMS11-AP
tech-c:         AH256-AP
nic-hdl:        HM20-AP
remarks:        Administrator for APNIC
notify:         hostmaster@apnic.net
mnt-by:         MAINT-APNIC-AP
last-modified:  2013-10-23T04:06:51Z
source:         APNIC

% Information related to 'AS133555'

% Abuse contact for 'AS133555' is 'abuse@zhangcheng.org'

aut-num:        AS133555
as-name:        DOORPOST-AS-AP
descr:          DOORPOST Limited
descr:          No. 10, Jianling Street, Jianchang County, Liaoning Province
country:        CN
org:            ORG-DL38-AP
sponsoring-org: ORG-NDIT1-AP
admin-c:        CZ2080-AP
tech-c:         CZ2080-AP
abuse-c:        AD916-AP
mnt-by:         APNIC-HM
mnt-lower:      MAINT-NBDHM-CN
mnt-routes:     MAINT-NBDHM-CN
mnt-irt:        IRT-DOORPOST-CN
last-modified:  2024-07-22T23:30:56Z
source:         APNIC

irt:            IRT-DOORPOST-CN
address:        No. 10, Jianling Street, Jianchang County, Liaoning Province
e-mail:         noc@zhangcheng.org
abuse-mailbox:  abuse@zhangcheng.org
admin-c:        CZ2080-AP
tech-c:         CZ2080-AP
auth:           # Filtered
remarks:        abuse@zhangcheng.org was validated on 2025-12-16
remarks:        noc@zhangcheng.org was validated on 2025-12-23
mnt-by:         MAINT-NBDHM-CN
last-modified:  2025-12-23T14:50:22Z
source:         APNIC

organisation:   ORG-DL38-AP
org-name:       DOORPOST Limited
org-type:       OTHER
address:        No. 10, Jianling Street, Jianchang County, Liaoning Province
country:        CN
phone:          +86-13700004291
e-mail:         i@zhangcheng.org
admin-c:        CZ2080-AP
tech-c:         CZ2080-AP
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T04:16:38Z
source:         APNIC

role:           ABUSE DOORPOSTCN
country:        ZZ
address:        No. 10, Jianling Street, Jianchang County, Liaoning Province
phone:          +000000000
e-mail:         noc@zhangcheng.org
admin-c:        CZ2080-AP
tech-c:         CZ2080-AP
nic-hdl:        AD916-AP
remarks:        Generated from irt object IRT-DOORPOST-CN
remarks:        abuse@zhangcheng.org was validated on 2025-12-16
remarks:        noc@zhangcheng.org was validated on 2025-12-23
abuse-mailbox:  abuse@zhangcheng.org
mnt-by:         APNIC-ABUSE
last-modified:  2025-12-23T14:50:44Z
source:         APNIC

person:         Cheng Zhang
address:        No. 10, Jianling Street, Jianchang County, Liaoning Province
country:        CN
phone:          +86-13700004291
e-mail:         i@zhangcheng.org
nic-hdl:        CZ2080-AP
mnt-by:         MAINT-NBDHM-CN
last-modified:  2020-08-06T14:24:51Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-US2)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.apnic.net",
  "as_blocks" : [ {
    "as_block" : "AS133120 - AS133631",
    "description" : [ "APNIC ASN block" ],
    "admin_contacts" : [ "HM20-AP" ],
    "tech_contacts" : [ "HM20-AP" ],
    "remarks" : [ "These AS numbers are further assigned by APNIC", "to APNIC members and end-users in the APNIC region" ],
    "mnt_by" : [ "APNIC-HM" ],
    "mnt_lower" : [ "APNIC-HM" ],
    "date_updated" : "2013-09-11",
    "source" : "APNIC"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS133555",
    "as_name" : "DOORPOST-AS-AP",
    "description" : [ "DOORPOST Limited", "No. 10, Jianling Street, Jianchang County, Liaoning Province" ],
    "country" : "CN",
    "organization" : "ORG-DL38-AP",
    "sponsoring_organization" : "ORG-NDIT1-AP",
    "admin_contacts" : [ "CZ2080-AP" ],
    "tech_contacts" : [ "CZ2080-AP" ],
    "abuse_contacts" : [ "AD916-AP" ],
    "mnt_irt" : [ "IRT-DOORPOST-CN" ],
    "mnt_lower" : [ "MAINT-NBDHM-CN" ],
    "mnt_routes" : [ "MAINT-NBDHM-CN" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2024-07-22",
    "source" : "APNIC"
  } ],
  "irt" : {
    "handle" : "IRT-DOORPOST-CN",
    "address" : [ "No. 10, Jianling Street, Jianchang County, Liaoning Province" ],
    "street" : "Jianling Street",
    "district" : "Jianchang County",
    "state" : "LIAONING PROVINCE",
    "email" : [ "noc@zhangcheng.org" ],
    "abuse_mailbox" : [ "abuse@zhangcheng.org" ],
    "admin_contacts" : [ "CZ2080-AP" ],
    "tech_contacts" : [ "CZ2080-AP" ],
    "remarks" : [ "abuse@zhangcheng.org was validated on 2025-12-16", "noc@zhangcheng.org was validated on 2025-12-23" ],
    "mnt_by" : [ "MAINT-NBDHM-CN" ],
    "date_updated" : "2025-12-23",
    "source" : "APNIC"
  },
  "organization" : {
    "handle" : "ORG-DL38-AP",
    "name" : "DOORPOST Limited",
    "type" : "OTHER",
    "address" : [ "No. 10, Jianling Street, Jianchang County, Liaoning Province" ],
    "street" : "Jianling Street",
    "district" : "Jianchang County",
    "state" : "LIAONING PROVINCE",
    "country" : [ "CN" ],
    "email" : [ "i@zhangcheng.org" ],
    "phone" : [ "+86-13700004291" ],
    "admin_contacts" : [ "CZ2080-AP" ],
    "tech_contacts" : [ "CZ2080-AP" ],
    "mnt_ref" : [ "APNIC-HM" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2023-09-05",
    "source" : "APNIC"
  },
  "administrative_contacts" : [ {
    "handle" : "CZ2080-AP",
    "name" : "Cheng Zhang",
    "address" : [ "No. 10, Jianling Street, Jianchang County, Liaoning Province" ],
    "street" : "Jianling Street",
    "district" : "Jianchang County",
    "state" : "LIAONING PROVINCE",
    "country" : "CN",
    "email" : [ "i@zhangcheng.org" ],
    "phone" : [ "+86-13700004291" ],
    "mnt_by" : [ "MAINT-NBDHM-CN" ],
    "date_updated" : "2020-08-06",
    "source" : "APNIC"
  } ],
  "technical_contacts" : [ {
    "handle" : "CZ2080-AP",
    "name" : "Cheng Zhang",
    "address" : [ "No. 10, Jianling Street, Jianchang County, Liaoning Province" ],
    "street" : "Jianling Street",
    "district" : "Jianchang County",
    "state" : "LIAONING PROVINCE",
    "country" : "CN",
    "email" : [ "i@zhangcheng.org" ],
    "phone" : [ "+86-13700004291" ],
    "mnt_by" : [ "MAINT-NBDHM-CN" ],
    "date_updated" : "2020-08-06",
    "source" : "APNIC"
  } ],
  "abuse_contacts" : [ {
    "handle" : "AD916-AP",
    "name" : "ABUSE DOORPOSTCN",
    "address" : [ "No. 10, Jianling Street, Jianchang County, Liaoning Province" ],
    "street" : "Jianling Street",
    "district" : "Jianchang County",
    "state" : "LIAONING PROVINCE",
    "country" : "ZZ",
    "email" : [ "noc@zhangcheng.org" ],
    "abuse_mailbox" : [ "abuse@zhangcheng.org" ],
    "phone" : [ "+000000000" ],
    "admin_contacts" : [ "CZ2080-AP" ],
    "tech_contacts" : [ "CZ2080-AP" ],
    "remarks" : [ "Generated from irt object IRT-DOORPOST-CN", "abuse@zhangcheng.org was validated on 2025-12-16", "noc@zhangcheng.org was validated on 2025-12-23" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2025-12-23",
    "source" : "APNIC"
  } ]
}

Peers

AS Number	Description	Country
AS139317	Ningbo Dahuamao Information Technology Co Ltd	CN
AS52025	ParadoxNetworks Limited	GB
AS20473	The Constant Company, LLC	US

Upstreams

AS Number	Description	Country
AS139317	Ningbo Dahuamao Information Technology Co Ltd	CN
AS20473	The Constant Company, LLC	US

Contacts

Email Contacts

i@zhangcheng.org

Abuse Contacts

abuse@zhangcheng.org