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#1 Afterm4th


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Posted 13 September 2011 - 03:20 AM

Full Pdf:

Subpoena Compliance
Special Investigations
Law Enforcement Assistance Guide
for Internet Investigations
Law Enforcement Help Line (24/7): 877-646-6555
Facsimile: 703-886-0144CSI Law Enforcement Assistance (toll free): 877-646-6555
Fax Number: 703-886-0144
877-646-6555 703-886-0144 csi@mci.com
Maricon Corpuz, Investigator 703-886-3830 703-886-0144 maricon.corpuz@mci.com
L. Rebecca Rohrer, Investigator 703-886-3832 703-886-0144 laura.rohrer@mci.com
John St. Clair, Manager CSI 703-886-3822 703-886-0144 john.stclair@mci.com
Sally Weaver, Legal Assistant 703-886-4075 703-886-4399 sally.weaver@mci.com
Subpoena requests for Internet
Network & Facilities Legal Team
22001 Loudoun County Pkwy
Ashburn, VA 20147
703-886-0700 703-886-0144
NOTE: For investigations regarding telephone-related subscriber information, please direct requests to:
Subpoena Compliance
1133 19
Street, NW
Washington, DC 20036
Phone: 202-736-6885
Fax: 202-736-6970
Email: subpoenas@mci.comCSI Law Enforcement Assistance (toll free): 877-646-6555
Fax Number: 703-886-0144
MCI is a global telecommunications company with an expansive IP network, providing data and
Internet services to businesses (including Internet Service Providers), state and federal
government entities, and residential customers worldwide. UUNET Technologies, Inc., an MCI
Company, provides wholesale online dial-up, remote Internet access and high bandwidth
dedicated access.
Compliance and Special Investigations (CSI) is an MCI resource dedicated to assisting Law
Enforcement with Internet related criminal and civil investigations for which MCI may have
evidence. The purpose of this guide is to provide Law Enforcement with a basic understanding of
how MCI may assist with Internet investigations. The CSI staff is committed to providing timely
and accurate responses to Law Enforcement requests. Questions and comments are
Serving a Request on MCI
Subpoenas, search warrants and court orders may be served on MCI by any of the following
• Facsimile (CSI requests a follow-up copy by mail)
• Mail
• Personal delivery
Upon receipt of a request, CSI assigns an internal MCI ticket (reference) number and
acknowledges receipt of the request by fax. Investigation results are returned to the requesting
officer by fax, unless CSI is otherwise instructed. The average subpoena response time is 7 – 10
business days. CSI endeavors to accommodate extraordinary circumstances or special response
requirements when possible.CSI Law Enforcement Assistance (toll free): 877-646-6555
Fax Number: 703-886-0144
Request Format
In order to initiate an investigation, the following information is required to obtain accurate results:
• Internet Protocol (“IP”) address
• Date of connection
• Time of connection (if applicable)
• Time zone (when applicable, time zone information is critical to an accurate investigation
as the time zone is determined by the machine on which the connection is logged,
regardless of geographic location of the machine or the end user)
The language below, incorporating the above-referenced information, is suggested for a request
pertaining to Internet connections:
“Please provide any and all subscriber and/or account information pertaining to
the connection using [ IP address ],on [ date ], at [ time; time zone.]”
Response Formats
The information available to CSI, and the format of CSI’s response, will vary depending upon
whether the subject user’s Internet connection was established via a dynamic or static IP
address. (Note: through its UUNET subsidiary, MCI sells Internet services to resellers or
wholesale customers, who resell MCI products and services to Internet end-users, or large
corporate customers. As such, MCI has no customer relationship with most end-users and
therefore does not maintain detailed subscriber information or customer records for such users.)
Dynamic IP: An IP address that is temporarily assigned to an end user’s machine at the
time and for the duration of each connection. The most common application of dynamic IP
assignment is “dial-up” Internet access, which is established via a telephone line. Some DSL
service connections are also dynamic in that a new IP address is assigned to the DSL end
user each time the end user’s computer is turned on. MCI maintains dial-up and dynamic
DSL connection logs. However, because many of these users are not direct customers of
MCI, CSI has no visibility into the account information beyond the username. Generally, the
MCI reseller who maintains the account can provide further information about the user (e.g.
name, address, billing records, etc.). The reseller will most likely require a subpoena to do
Static IP: An IP address that is permanently assigned to a computer. This type of Internet
connection is commonly referred to as dedicated, as it is “always on.” The end users are
generally employees of MCI corporate customers or customers of resellers to whom MCI hasCSI Law Enforcement Assistance (toll free): 877-646-6555
Fax Number: 703-886-0144
allocated a block of IP addresses. MCI does not maintain logs for dedicated access,
however, CSI will provide contact information for the immediate MCI customer or reseller
whom will most likely require a subpoena to provide information pertaining to the request.
The table below illustrates the information that may be provided by CSI depending on the subject
user’s means of Internet access.
Access Method Response
Dynamic IP
(e.g. dial-up access,
some DSL services)
• Username (e.g. username@ispname.com)
• Reseller (including contact information)
• IP address of destination host, if available
• IP address of source host, if available
• Time of connection
• Time of disconnect
• ANI (Automatic Number Identification), if available
• DNIS (Dialed Number Identification Service), if available
Static IP
(e.g. dedicated
connections, some
DSL services)
• Site name (an MCI internal account identifier)
• Company name (the reseller or corporate customer to whom subject
IP has been allocated)
• Company contact information (e.g. address, phone/fax numbers)
• Technical contact (phone, fax and/or email, if available)
• Security contact (phone, fax and/or email, if available)CSI Law Enforcement Assistance (toll free): 877-646-6555
Fax Number: 703-886-0144
Frequently Asked Questions
What is the turn-around time on a subpoena request?
CSI’s average response time is 7 - 10 business days, but may vary depending on the
Why is it important to provide the accurate time zone information on a request?
The correct time zone information is a crucial element for CSI to conduct an accurate
investigation. A connection’s time zone is determined by the machine that logs the
connection, regardless of the machine’s geographic location. For example, a logging
machine that is physically located in the Pacific time zone may be set to log all connections
in Eastern time. Please also note that the geographic location of the end user is irrelevant
to the time zone of the connection.
When obtaining connection information, always confirm the correct time zone with the
source of that information.
What is the retention period for MCI’s connection logs?
Logs for dial-up connections are maintained for approximately two years. MCI does
not maintain logs for dedicated access.
Why is ANI not always provided in responses?
The availability of ANI (origin telephone number) depends on the machine (or server) that
records the log-on information. Older machines that are still in use may not be configured
to record ANI. If requested, ANI information is always included in CSI’s response when
Does MCI require a subpoena to confirm if a company or user associated with a particular
IP address is an MCI customer?
Yes. Disclosure of customer or user information is limited by both contractual obligations to
limit disclosure of such information and by federal and state laws that limit or prohibit
disclosure of information.
Does MCI alert its customers about requests served seeking information relative to
criminal investigations?
No. MCI maintains strict confidentiality with respect to all criminal matters. Customers are
not notified by MCI.
In the case of an international investigation, can a request be served on MCI in the U.S. if
the records reside with an MCI company overseas?
No. Requests seeking information relative to an overseas investigation must be served on
the appropriate entity in the country where the records reside.CSI Law Enforcement Assistance (toll free): 877-646-6555
Fax Number: 703-886-0144
Common Terminology
Access number: A telephone number dialed by a subscriber to connect to the Internet. May
also be referred to as DNIS (Dialed Number Identification Service).

ANI (Automatic Number Identification): The origin telephone number from which the
connection to the Internet was established. (ANI information is not always available. When
captured, it will be included in a subpoena response.)
Authentication: The verification of the identity of a person or process.
Dedicated connection: A high speed, “always on” connection to the Internet.
Destination host: The dial-up user’s computer. The destination host is assigned a dynamic IP
address by the source host upon, and for the duration of, a dial-up user’s connection to the
Internet. Because this IP address is “dynamic” it varies with each connection.
Dial-up connection: A temporary connection between computers established over a telephone
DNIS (Dialed Number Identification Service): The number dialed by a user or computer to
connect to the Internet. (Also known as an Access Number.)
DNS (Domain Name Server or Domain Name System): A mechanism on the Internet that
translates Internet addresses (URLs) into their corresponding IP addresses.
DSL (Digital Subscriber Line): High speed Internet connection over ordinary telephone lines.
Depending on type of DSL services, the associated IP address may be dynamic or static.
Dynamic IP: A temporary IP address assigned to an end-user at the time and for the duration of
each Internet connection.

Host: A computer that allows users to communicate with other host computers on a network.
IP address (Internet Protocol address): A unique, 32-bit number assigned to a specific host
(computer) on the Internet. All Web addresses (e.g. www.mci.com) and email addresses (e.g.
abuse@mci.com) have a corresponding IP address.
Message header: The information at the beginning of an email or bulletin board message that
contains the identities of the mail servers that the original message traveled through to get to its
final destination.
Point of Presence (PoP): A physical site with a collection of telecommunication equipment,
including devices designed for network access via dial-up connections.
Protocol: A series of rules and conventions that allow different kinds of computers and
applications to communicate over a network.
Reseller: A direct MCI customer who resells MCI’s products and services under its own name.
MCI allocates blocks of IP addresses to reseller customers who may reallocate the IP numbers to
their own customers.
Server: A computer that provides information to other computers and/or machines on a network.
For example, web servers send out web pages; mail servers deliver email; list servers administer
mailing lists, etc.CSI Law Enforcement Assistance (toll free): 877-646-6555
Fax Number: 703-886-0144
Source host (Source IP): The network access server that assigns the dynamic IP address for a
dial-up Internet connection to the dial-up user’s computer (the destination host).
Static IP: An IP address permanently assigned to a computer or other network machine;
typically associated with dedicated connections.
Traceroute: A utility that displays the connection path from one machine to a destination
machine, showing the amount of time it takes to get from start to finish and identifying each
machine through which the traffic travels.
URL (Universal Resource Locator): An Internet address, such as www.mci.com.
Username: The unique account identifier of an Internet user.
Whois: An online, searchable database of domain names available via the Internet. Whois
search results can provide detailed contact information for persons or entities to whom IP
addresses are assigned and/or domain name registrations are registered. (See www.arin.net)

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