IP Justification

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Dacentec requires all IP assignemnts larger than a /30(1 Usable IP) to be justified according to ARIN requirements.


We reserve the right to request additional data from customers and to also retransmit requests for additional data from ARIN to customers.

Customers with several blocks may be asked to submit an excel spreadsheet or text document listing information on each IP. This could be a list of IPs with the associated customer name and Email address or could be a list of domains hosted per IP for a hosting environment.


IP Services Offered

  • REASSIGN: This will register the your information to your IP addresses in the PUBLIC RWHOIS database. It will use the information you have registered with us.
  • REALLOCATE: This will delegate ALL responsibility to you for abuse and technical inquiries. This is offered to clients who have an ARIN POC/ORG ID.

Example Justification

Dacentec IP Allocation Policy

Dacentec is provided with IP addresses from ARIN who allocates blocks 
of IP addresses to Internet and Hosting Service Providers (ISPs and 
HSPs) for the purpose of reassigning that space to their customers.
ARIN takes guidance from allocation policies and procedures set 
forth in RFC 2050 and Dacentec is therefore bound by those regulations. 
Because Dacentec views our relationship to the broader Internet 
as critical to achieving our customers' needs, we seek to assist 
the global Internet community in achieving the following IP address 

1) Conservation: Fair distribution of globally unique Internet 
address space according to the operational needs of the end-users 
and Internet Service Providers operating networks using this address 
space. Prevention of stockpiling/hoarding in order to maximize the 
lifetime of the Internet address space.

2) Routability: Distribution of globally unique Internet addresses 
in a hierarchical manner, permitting the routing scalability of the 
addresses. This scalability is necessary to ensure proper operation 
of Internet routing, although it must be stressed that routability 
is in no way guaranteed with the allocation or assignment of 
IPv4 addresses.

3) Registration: Provision of a public registry documenting address 
space allocation and assignment.  This is necessary to ensure uniqueness 
and to provide information for Internet trouble shooting at all levels.

To assist in reaching these goals, Dacentec follows these guidelines:

1) For all servers requesting more than 1 IP address, Dacentec requires 
customers to provide technical justification for their IP address usage.
(See Application Form Below)
2) Dacentec may deny an IP network of any size if the customer cannot 
demonstrate 25% immediate usage.
3) Dacentec may recover an IP network allocation of any size if the customer 
cannot show 40% usage after 3 to 6 months.

4) For networks with a CIDR prefix equal to or shorter than /24 
(i.e. greater than or equal to 256 IP addresses or 'Class C'), 
Dacentec may demand a network engineering diagram from the customer. 
The diagram will be a textual description of the use of sub-netting 
within the /24 or shorter-prefixed network.

Technical Justification:
Client ID:  ____________________________
E-Mail Address: [email protected]___________
First Name: ____John____________________
Last Name: _____Doe_____________________
Company Name: __Joe's Dough_____________
Address: _______123 Sesame ST___________
Address: _______APT 456_________________
City: __________Brooklyn________________
State: _________NY______________________
ZIP/Postal Code: _11201_________________
Phone: _________________________________

In the following table please provide the IP Address, domain name, 
and/or service that will be running on that IP Address. 
If Dacentec has not given you a range of new IP network addresses, you may 
use existing IP address space to justify usage or use sequential addresses 
in the range - to 

If you are running more than one domain per IP, please indicate 
NAME BASED in the Service field. 

If you do not have a domain or service planned for the particular 
IP address at this time, please indicate your estimated date of 
usage for the IP address in question in the Service field.

Please complete multiple pages as required by the size of your IP request.

#    IP ADDRESS	          DOMAIN NAME	         SERVICE
1)  _192.168.0.1        ____superdomain.net___	___VPS________ 
2)  _192.168.0.2        ____dns.cars4u.com___	___DNS________
3)  _192.168.0.3	____windowsbox.org___	___development
4)  ____________	_____________________	______________
5)  ____________	_____________________	______________
6)  ____________	_____________________	______________
7)  ____________	_____________________	______________
8)  ____________	_____________________	______________

++++++++++++++++++++++++++++OR Email Addresses++++++++++++++++

#    IP ADDRESS	          DOMAIN NAME	         SERVICE
1)  _192.168.0.1        [email protected]___	___VPS________ 
2)  _192.168.0.2        [email protected]	___DNS________
3)  _192.168.0.3	___ceo.busyness.org__	___development
4)  ____________	_____________________	______________
5)  ____________	_____________________	______________
6)  ____________	_____________________	______________
7)  ____________	_____________________	______________
8)  ____________	_____________________	______________

'''''Add as many entries as required'''''
(add more lines as required)

/32 = 1 IP 
/30 = 2 IPs 
/29 = 6 IPs 
/28 = 14 IPs 
/27 = 30 IPs 
/26 = 64 IPs 
/25 = 128 IPs 
/24 = 256 IPs