For Australia:

In an Emergency always dial: 000

Child Wise-National Child Abuse Prevention Helpline Contact Details: 1800 99 10 99
1800 RESPECT: 1800 737 732 is a national sexual assault, family and domestic violence counselling line for anyone who has experience or is at risk of violence.

KIDS HELPLINE: 1800 55 1800 Kids Helpline is a free, 24 hour counselling service for young people aged 5-25 years.

USA:

In an Emergency always dial: 911

The Childhelp National Child Abuse Hotline 1-800-4-A-CHILD (1-800-422-4453) is dedicated to the prevention of child abuse. Serving the United States, its territories, and Canada, the hotline is staffed 24 hours a day, 7 days a week with professional crisis counselors who, through interpreters, can provide assistance in over 200 languages. The hotline offers crisis intervention, information, literature, and referrals to thousands of emergency, social service, and support resources. All calls are confidential.

To Report Child Abuse Call the New York State Central Register of Child Abuse & Maltreatment: 800.342.3720

To Report Child Abuse Outside New York Visit the Child Welfare Information Gateway here https://www.childwelfare.gov/organizations/?CWIGFunctionsaction=rols:main.dspROL&rolType=custom&rs_id=5

In Europe:

In an Emergency always dial: 112

The European Commission Victims of Crime helpline: 116 006 for victims of crime gives people emotional support, informs them of their rights and how to use them, while also referring victims to the relevant organisations.

The EC Child helpline: 116 111 is specifically for children who seek assistance and need someone to talk to. The service helps children in need of care and protection and links them to the appropriate services and resources; it provides children with an opportunity to express their concerns and talk about issues directly affecting them.

UK:

In an Emergency always dial: 999

The National Crime Agency command: 0800 1111 Childline is available 24 hours a day and won’t appear on a phone bill. It is safe and confidential place to report anything.

National Society for the Prevention of Cruelty to Children (NSPCC): 0808 800 5000 or text 88858 for support for adults who are worried about a child and consultations with professionals who come into contact with abused children or children at risk of abuse.

Directgov: to report neglect or abuse of a child to your local authority, visit http://local.direct.gov.uk/LDGRedirect/Start.do?mode=1