MCI Lawful Disclosure PDF

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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

Maricon Corpuz, Investigator 703-886-3830 703-886-0144

L. Rebecca Rohrer, Investigator 703-886-3832 703-886-0144

John St. Clair, Manager CSI 703-886-3822 703-886-0144

Sally Weaver, Legal Assistant 703-886-4075 703-886-4399

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.

• 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. and email addresses (e.g. 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

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


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